© 2020 The Authors. R&D Management published by RADMA and John W ile y & Sons Ltd 1 This is an open access article under the terms of the Creati ve Commons Attribution License, which permits use, distribution and reproduction in an y medium, provided the original w ork is properly cited. Ho w entr epr eneurial orientation can le v erage inno v ation pr oject portf olio management Alexander K ock 1 and Hans Georg Gemünden 2,3 1 Chair for T echnology and Innov ation Management, T echnische Univ ersität Darmstadt, Hochschulstraße 1, 64289, Darmstadt, Germany . k [email protected] 2 Department of Leadership & Or ganization,Handelsho yskolen BI, Oslo, Akershus Norway . [email protected] 3 Chair for T echnology and Innov ation Management,T echnische Uni versität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany . [email protected] Innov ation project portf olio management (IPPM) is a key task in R&D management because this decision-making pr ocess determines which R&D projects should be undertak en and how R&D r esources ar e allocated. Pre vious resear ch has developed a good understanding of the r ole of IPPM in R&D strategy implementation and of successful IPPM practices. But the fundamental orientations that driv e the strategy f ormation and implementation process ha ve nev er been in vestigated in the context of IPPM, and it is unclear whether successful prac - tices ar e equally valid f or different strategic orientations. This study , theref ore, in vestigates the moderating impact of a f irm’ s entrepr eneurial orientation on the relationship between strategic portf olio management practices and portfolio success. An empirical analysis of 257 f irms shows that both innovati veness and risk taking as entr epreneurial orientation’ s dimen - sions positiv ely moderate the relationship between managerial practices and perf ormance. Specif ically , we f ind that f irms high in innovativ eness prof it more fr om stakeholder engage - ment compar ed to f irms low in innov ativeness. Firms high in risk-taking pr of it more fr om a clearly f ormulated strategy . With incr easing innov ativeness and risk-taking pr opensity , f irms also prof it more fr om b usiness case monitoring and agility in portf olio steering. The r esults suggest that a f irm’ s entrepr eneurial orientation can leverage the effect of IPPM practices. V ice versa, a lacking entr epreneurial orientation can r ender these practices inef - fectiv e. Strategic orientation and IPPM practices should, theref ore, be aligned with each other to enable f irms to better implement their strategy and generate competitive advantage. 1. Intr oduction T he management of research and de velopment takes place at three dif ferent le vels: (1) the stra- tegic le vel, on which managers de velop strate gic in- nov ation goals and the roadmaps ho w to reach them (Salomo et al., 2008; T alke et al., 2011); (2) the tacti- cal le vel of innov ation project portfolio management, on which managers determine which R&D projects are undertaken and ho w resources are allocated to them (Floricel and Ibanescu, 2008; Spieth and Lerch, 2014); and (3) the operational le vel of single R&D projects, on which innov ati ve de velopment and re- search tasks are e xecuted (K eller , 2017; Chappin et al., 2019). The current paper concentrates on the connection between the strate gic and the tactical © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 2 R&D Management 2020 le vel, by analyzing ho w the ef fecti veness of portfolio management practices at the tactical le vel is af fected by characteristics of the strategic le vel. Such an in- vestig ation is useful because R&D di visions work on many projects simultaneously , and the selection of the right candidates, the allocation of scarce re- sources to projects, and the management of interde- pendencies between projects has become a critical process for the ov erall innov ation success (Spieth and Lerch, 2014; K ock and Gemünden, 2016; Clegg et al., 2018). Innov ation project portfolio management (IPPM) is a dynamic decision-making process to screen, select, and prioritize project proposals, as well as to allocate resources to projects according to prior - ities (Cooper et al., 2001b). Quite a fe w studies hav e in vestig ated what constitutes success in portfolio management (Cooper et al., 2001a; Jonas et al., 2013; K ester et al., 2014; Martinsuo and Killen, 2014) and what or ganizational le vers af fect success (Müller et al., 2008; Lerch and Spieth, 2013; Spieth and Lerch, 2014; K ock et al., 2015). Since not all prac- tices are likely to be ef fecti ve in all conte xts, many authors call for a contingency perspecti ve to in ves- tigate the boundary conditions of successful portfo- lio management (Floricel and Ibanescu, 2008; Petit, 2012; Martinsuo, 2013; K ock et al., 2016). Pre vious research has mainly concentrated on contingency f actors such as portfolio characteris- tics (T eller et al., 2012; K opmann et al., 2015) or the external en vironment (Floricel and Ibanescu, 2008; Petit, 2012; K opmann et al., 2017) and largely neglected boundary conditions stemming from the strategic le vel (an e xception is Rank et al., 2015). Specif ically , an important, yet neglected contin- gency f actor is the strate gic orientation of the f irm (Mintzber g, 1973; Miller , 1983; V enkatraman, 1989; Covin and Sle vin, 1991). This is surprising, because research on portfolio management emphasizes that portfolios are important vehicles for strate gy reali- zation in that they represent the connection between strategy and operational projects (Mesk endahl, 2010; K opmann et al., 2017; Clegg et al., 2018). Although there is empirical e vidence that firms with a strong innov ation orientation ha ve more inno v ativ e portfo- lios, which in turn leads to higher success (T alke et al., 2011), little is kno wn whether and how success- ful IPPM practices actually dif fer for these firms. T o the best of our kno wledge, so far , no empirical study in vestig ated whether portfolio management practices ha ve dif ferent performance ef fects under dif ferent strategic orientations. In the current study , we resort to the concept of entrepreneurial orientation (EO) as a particularly important form of strategic orientation (Rauch et al., 2009; Anderson et al., 2015) and empirically in vestig ate its moderating impact on the relation- ship between portfolio management and success. Therefore, the research question is: How do IPPM practices dif fer in their performance impact depend- ing on the entr epr eneurial orientation of the firm? The paper contrib utes to both literatures on port- folio management and on EO. First, the study con- trib utes to a better understanding of the boundary conditions for successful strategy implementation by portfolio management. Pre vious conceptual research stressed the strategy formation process’ s impor- tance in portfolio management and the possible role of strategic orientation (Mesk endahl, 2010). This study provides the f irst empirical test of this role by sho wing that portfolio practices differ in their rela- tionship to performance depending on the f irm’ s EO. The results suggest that a f irm’ s EO can le verage the performance impact of IPPM practices and that these practices should be aligned to the f irm’ s EO to enable f irms to better implement their strategy and generate competiti ve adv antage. In sho wing the moderating ef fect of EO, this study identifies a ne w and import- ant strategic contingenc y factor for IPPM. Second, we follo w the call for more empiri- cal research on moderators of the EO-performance link (Rauch et al., 2009; Rosenb usch et al., 2013). EO is one of the most studied concepts in the Entrepreneurship literature, yet most studies concen- trate on its dir ect performance ef fects. Since reported performance relationships are heterogeneous (Rauch et al., 2009), ‘research needs to reconsider models of the role of third v ariables in the relationship between EO and performance’ (Rosenb usch et al., 2013, p. 651). By introducing a portfolio management per - specti ve to the EO f ield, we also enrich this stream of research and in vestig ate IPPM as a possible enabler . 2. Conceptual backgr ound 2.1. Entr epr eneurial orientation The entrepreneurial orientation (EO) concept is rooted in the strategy-making literature and can be described as ‘the entrepreneurial strategy-making processes that ke y decision makers use to enact their f irm’ s organizational purpose, sustain its vision, and create competiti ve adv antage(s)’ (Rauch et al., 2009, p. 763). Already Mintzberg (1973) ar gued that firm performance is lar gely dictated by gestalts comprised of strategic choices, or ganizational structure, and en vironmental requirements. As one such gestalt is entrepreneurial, Miller (1983) characterized entre- preneurial f irms as those that pursue innov ation, © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 3 aggressi vely enter ne w markets, and accept a mea- sure of strategic risk. Based on this w ork, Covin and Sle vin (1991) suggested that a firm’ s strategic beha vioral procli vities range on a continuum from more conserv ativ e to more entrepreneurial. They posited that the entrepreneurial end of the continuum is e videnced by innov ati veness, proacti veness, and risk taking. Although alternati ve approaches ha ve been de veloped (e.g., Lumpkin and Dess, 1996; see also the similar construct of strategic orientation by V enkatraman, 1989), meta-analyses sho w that the conceptualization by Covin and Sle vin is the domi- nant perspecti ve (Rauch et al., 2009; Rosenb usch et al., 2013). Conceptually , firms should prof it from adopting an EO, because a rapidly changing en vironment ren- ders future re venues from existing b usiness uncertain and f irms need to constantly identify ne w opportuni- ties (Lumpkin and Dess, 1996; Rauch et al., 2009). Empirically , Rauch et al. (2009) can confirm the pos- iti ve relationship between EO and f irm performance in their meta-analysis. Ho wev er , they also observ e a lar ge v ariance in ef fect sizes and consequently sug- gest that future research should in vestig ate, ho w EO interacts with other v ariables in their relationship with performance. So far , only fe w studies in ves- tigated the moderating influence of EO (W alter et al., 2006; W u et al., 2008; W ales et al., 2013; Rank et al., 2015). Since portfolio management is a cen- tral means of strategy implementation (Mesk endahl, 2010; K opmann et al., 2017; Clegg et al., 2018), we in vestig ate whether and ho w EO le verages the perfor - mance of strategic portfolio management practices. There is considerable debate in the literature reg arding EO’ s proper dimensionality and mea- surement (e.g., Covin and W ales, 2012; Lomberg et al., 2017). Lomber g et al. (2017) demonstrated a high ov erlap between the dimensions innov ativ e- ness, proacti veness and risk taking, as well as their ef fect on performance. W ith regard to this concep- tual and empirical ov erlap, Anderson et al. (2015, p. 1,580) suggest a reconceptualization along only two dimensions and ar gue that ‘entrepreneurial behaviors and managerial attitude to wards risk jointly and in totality comprise the conceptual domain of f irm- le vel EO’ (Anderson et al., 2015, p. 1,580). In order to keep our model parsimonious and a void redun- dancy in our in vestigation, we follo w this approach. W e, therefore, in vestig ate innovativeness (which includes proacti veness) and risk taking as the two def ining dimensions of entrepreneurial orientation. Innovativeness is the forw ard-looking predisposition to engage in creati vity and experimentation, charac- terized by the introduction of ne w products ahead of the competition, and risk taking in v olves taking bold actions by venturing into the unkno wn and commit- ting resources to ventures in uncertain en vironments. Strategic portfolio management practices will lik ely dif fer in their performance impact depending on the f irm’ s positioning along these dimensions of EO. 2.2. P ortfolio manag ement Innov ation project portfolio management is a dynamic decision-making process in which projects are e valuated and selected and in which resources are allocated (Cooper et al., 2001b). Cooper et al. (2001b) summarize the purpose of portfolio manage- ment as doing the right things and contrast it with the purpose of project management – doing things right . According to their initial studies, the right projects are the ones that provide maximum v alue, achie ve a balance, and align with strategy . Since then, research- ers de veloped a comprehensi ve understanding of portfolio success (Martinsuo and Lehtonen, 2007; Müller et al., 2008; Jonas, 2010; Meskendahl, 2010; Martinsuo and Killen, 2014). Recent research con- ceptualizes portfolio success as a multidimensional construct with the follo wing dimensions (Jonas et al., 2013; K ester et al., 2014; K ock et al., 2015; K opmann et al., 2017): strategic implementation suc- cess, portfolio balance, a verage product success, and syner gy exploitation. Strate gic implementation success is defined by the strategic f it of the portfolio (Meskendahl, 2010) and the percei ved implementation success of the strat- egy (K opmann et al., 2017). P ortfolio balance con- cerns the equilibrium of risks, long- and short-term opportunities, and the steady utilization of resources within the project portfolio’ s ex ecution (Killen et al., 2008; T eller et al., 2012). A verag e pr oduct success is measured by the commercial success of project out- comes, which determine in their entirety the quality and success of the strategy implementation. Syner gy e xploitation represents the added v alue that emerges from dedicated portfolio management, ov er and abov e contributions from indi vidual projects by cap- italizing on interdependencies and a voiding redun- dancies (Jonas, 2010; Meskendahl, 2010). Portfolio management has been characterized as a phase-based decision-making process (Jonas, 2010; Beringer et al., 2013; Jonas et al., 2013). Although dif ferent phase models with different le vel of detail exist, we will concentrate on the tw o most generic phases portfolio structuring and portfolio steering to extract those management practices that most lik ely dependent on the f irm’ s strategic orientation in their performance impact. The portfolio structuring phase refers to the target portfolio’ s composition that contributes the highest © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 4 R&D Management 2020 v alue to the organization and is aligned with the strat- egy . Structuring comprises the innov ation projects’ e valuation, prioritization, and selection. The main objecti ve in this phase is to ensure that the portfo- lio optimally reflects the or ganization’ s strategy . Based on pre vious literature (Morris and Jamieson, 2005; Salomo et al., 2008; de Brentani et al., 2010; Meskendahl, 2010; T urner and Zolin, 2012), we ar gue that adequately in volving critical stak ehold- ers and def ining a clear strategy are essential stra- tegic management practices in portfolio structuring. Stakeholder in volvement is defined as the e xtent to which dif ferent relev ant firm-internal portfolio stakeholders (such as functional managers, di vision heads) ha ve the possibility to engage in and af fect the de velopment of the portfolio strategy (T urner and Zolin, 2012; Beringer et al., 2013). In the long run, portfolio decisions af fect nearly all corporate functions (K ester et al., 2011). Integrating dif ferent internal stakeholders in the strate gy process is, there- fore, necessary to obtain di verse perspecti ves and a greater v ariance of alternativ es – resulting in a more holistic portfolio assessment – and to simultaneously gain consensus and joint commitment (Meskendahl, 2010; T urner and Zolin, 2012). Strate gic clarity means that the company or b usiness unit has a clearly formulated strategy , which is communicated and understood within the or ganization. A clearly formu- lated strategy is a necessary condition for ef fecti ve implementation of deliberate strate gy (Meskendahl, 2010; K opmann et al., 2017). Firms with a clear and focused strategy mak e better portfolio decisions (K ock and Gemünden, 2016) and more ef fecti vely implement the right projects (Salomo et al., 2008; de Brentani et al., 2010). The portfolio steering phase comprises the portfo- lio’ s ongoing coordination and control. This includes re-prioritizing or terminating projects, re-allocating resources, and exploiting syner gies (Blomquist and Müller , 2006; Blichfeldt and Eskerod, 2008; Unger et al., 2012; K ock and Gemünden, 2016). Successful portfolio management depends on the right type of controlling acti vities (Müller et al., 2008). High- performing f irms not only track time, cost, and scope adherence, b ut also continuously monitor the v alid- ity of each project’ s business case (K opmann et al., 2015). An essential managerial practice is, therefore, b usiness case monitoring – the ‘re v alidation of a project’ s business case considering changing project scope and timing as well as changing en vironmental conditions’ (K opmann et al., 2015, p. 532). Equally important in the portfolio steering phase is the or ga- nization’ s ability to quickly adapt the portfolio in a dynamic en vironment (Floricel and Ibanescu, 2008; Petit, 2012). Agility describes the extent to which a f irm is able to quickly adapt its innov ation portfolio to changing conditions (K ester et al., 2011; K ock and Gemünden, 2016). K ester et al. (2014) hav e sho wn that the ability of the f irm to make agile portfolio decisions and implement them is positi vely related to portfolio success. While we are aw are that there are other potentially rele vant IPPM practices, we concentrate on these four specif ic practices for the follo wing reasons. First, we deliberately chose the two most salient practices from the portfolio structuring phase (i.e., stakeholder in v olvement and strate gic clarity) and the portfolio steering phase (i.e., b usiness case monitoring and agility), respecti vely , to capture relev ant practices along the whole portfolio process. Second, all four practices are highly rele vant in IPPM, because the y ha ve been repeatedly sho wn to be related to portfo- lio success in dif ferent studies. Finally , the practices do not sho w conceptual overlap and are, therefore, not expected to be highly correlated. They , therefore, capture a wide spectrum of managerial acti vity , with- out being unspecif ic indicators of ov erall portfolio management maturity . In order to control for omitted practices, we also include portfolio management for - malization in the empirical model. Although all practices will likely be related to portfolio success, we will refrain from formulating hypotheses for their a verage ef fects and concentrate in the follo wing on how the relationship may be af fected by the firm’ s EO. 2.3. Hypotheses The ov erall framew ork is depicted in Figure 1. W e expect that the performance impact of IPPM practices in the structuring phase (i.e., stakeholder engagement and strategic clarity) and steering phase (i.e., b usi- ness case monitoring and agility) is stronger for f irms with a high EO characterized by innov ati veness and risk taking. 2.4. P ortfolio structuring Firms with a high EO stri ve for more innov ati ve proj- ects and are willing to take higher risks (Anderson et al., 2015). They f ace higher uncertainty regarding their en vironment: In highly innov ati ve projects, cus- tomers are often not kno wn in advance, and critical innov ati ve contrib utions often come from ne w and pre viously unknown e xternal partners (O’Connor and Rice, 2013). Firms with a high EO will thus, more likely search for ne w partners and lay more stress on assessing the risks they may induce. More acti ve search in a f irms’ market-related and tech- nology-related en vironments means an increasing © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 5 specialization and segmentation of their mark eting, R&D, and production functions. It also means higher uncertainty and more turb ulence regarding ne w technology , new customers, ne w suppliers, and ne w competitors. According to contingency theory (La wrence and Lorsch, 1967; Donaldson, 2001), a higher le vel of specialization implies that a higher le vel of integra- tion helps to a void otherwise increasing coordination losses between the more specialized functions. This is conf irmed by Ahmad et al. (2013) who sho wed that for increasing complexity functional integration is benef icial for NPD success (see also T roy et al., 2008). The collaboration between dif ferent functions provides a common understanding of the underlying assumptions, and therefore likely fosters the com- mitment to the formed project portfolio. Moreov er , the in v olvement of dif ferent functions in portfolio decisions will limit the risk of one perspecti ve’ s dominance and will promote the consideration of long-term objecti ves (T alke et al., 2011). Inte grating these functions’ stakeholders in the portfolio deci- sion-making process is, therefore, likely benef icial for potfolio success (Beringer et al., 2013). This inte- gration can happen at an operational le vel through cross-functional expert teams in projects (Nakata and Im, 2010) and at the strategic le vel go verning resource allocation in project portfolios (Cooper et al., 2001b; Beringer et al., 2013). W e assume that firms with a higher EO are often already working in more turb ulent high-tech indus- tries and/or mov e their firms to ward such en viron- ments. In turb ulent and complex en vironments, where data are incomplete or inaccurate, cross-func- tional integration has been sho wn to be particularly important for ef fectiv e decision making (Ancona and Caldwell, 1992). This is also sho wn in the meta-anal- ysis of T roy et al. (2008) who f inds that cross-func- tional integration is more strongly related to success in high-tech industries than in lo w-tech industries. In addition to the horizontal cross-functional inte- gration, the vertical integration of dif ferent manage- ment le vels has been sho wn to be related to project portfolio success (K opmann et al., 2017). Breaking do wn strategic goals to specif ic operational objec- ti ves can guide project selection and prioritization (Meskendahl, 2010). Ho we ver , in turbulent times, the premises of such top-do wn dev eloped strategies may get eroded and unanticipated strategic oppor - tunities are likely to be better recognized by middle and lo wer managers who can better access informa- tion on ne w technology- and market-related gro wth paths (K opmann et al., 2017). Firms with a high EO gi ve more autonomy to lo wer and middle managers (Lumpkin and Dess, 1996) and more likely encour - age the de velopment of bottom-up emerging strate gd market-related uncertainties as opportunities. These f irms often use specific acti vities to sense and seize opportunities, and transform their or ganization to exploit them (T eece, 2007). A better integration of internal stakeholders in order to process the infor - mation and generate ne w concepts improves sensing and seizing functions. The returns for sensing and seizing opportunities are likely to be higher than the cost of performing these acti vities. Consequently , f irms with a high EO should realize a higher port- folio v alue from stakeholder in volv ement than firms with a lo w EO: H1: The r elationship between stakeholder in volve- ment and portfolio success is str onger for firms with an EO that is (a) high in innovativeness and (b) high in risk-taking pr opensity . Extant research documents that a higher strate gic goal clarity positi vely influences project portfolio success, because it allo ws to channel creativity for generating ideas and to better identif iy opportuni- ties (K ock et al., 2015), and thus select those proj- ects which promise a high strategy contrib ution (Meskendahl, 2010; Unger et al., 2012). This is in Figure 1. Research frame work. ^ƚĞĞƌŝŶŐ ^ƚƌƵĐƚƵƌŝŶŐ WŽƌƞŽůŝŽ^ƵĐĐĞƐƐ ŶƚƌĞƉƌĞŶĞƵƌŝĂůŽƌŝĞŶƚĂƟŽŶ /ŶŶŽǀĂƟǀĞŶĞƐƐ ZŝƐŬƚĂŬŝŶŐ ŐŝůŝƚLJ ƵƐŝŶĞƐƐĐĂƐĞŵŽŶŝƚŽƌŝŶŐ ^ƚĂŬĞŚŽůĚĞƌŝŶǀŽůǀĞŵĞŶƚ ^ƚƌĂƚĞŐŝĐĐůĂƌŝƚLJ WŽƌƞŽůŝŽŵĂŶĂŐĞŵĞŶƚ &ŝƌŵƐŝnjĞ WŽƌƞŽůŝŽƐŝnjĞ WD&ŽƌŵĂůŝnjĂƟŽŶ © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 6 R&D Management 2020 line with goal setting theory positing that challenging and more specif ic goals lead to higher performance (Locke and Latham, 2002). For more inno vati ve projects, higher uncertainty reg arding technological feasibility and customer preferences makes it more dif ficult to deri ve these goals (Salomo et al., 2007). Firms with a high EO should, therefore, require more learning processes reg arding technology and application and should on a verage ha ve less clear goals. Ho wev er , we argue that they will prof it more form an increase in strategic clarity than f irms with a lo w EO. Three ar guments underly this moderation hypothesis. First, market and technology visioning for radi - cally ne w products direct the attention on new chal - lenging goals, ener gize innov ators and moti v ate them intrinisically to engage themselv es for ne w products and services that enable important ne w functional - ities. Reid and de Brentani (2012) sho w a positiv e impact on early performance reg arding the moti v a - tion of innov ating teams, attraction of innov ating customers, and attraction of ne w financial capital. Second, a major problem in radically ne w prod - ucts is that their resources are often cannibalized by less innov ati ve products with kno wn customers. Innov ation leaders often implement strategic b uck - ets for highly innov ati ve projects to protect them against such a cannibalization by incremental projects (Hutchison-Krupat and Ka v adias, 2015). Salomo et al. (2008) analyze ho w innov ati ve topics are b undled in innov ation f ields, which implement strategic iniati ves for major innov ation themes. This acti vity structures portfolios and clarif ies visible goal commitments. The authors sho w that these activities increase the inno v a - ti veness of product portfolios and e ventually portfolio performance. W e assume that these strategic iniati ves not only coordinate innov ati ve projects to ward com - mon goals b ut also moti v ate managers and kno wledge work ers to engage in such acti vities. Third, innov ati ve portfolios require a pipeline of v aluable ideas. Firms engaging in initiativ es to create such an ideation portfolio realize a higher front-end success (K ock et al., 2015). The y giv e their employ - ees more support and autonomy , and apply trans - parent and fair processess to pick the best ideas. In doing so, f irms learn what ne w technologies are able to deli ver and ho w customers v alue ne w functional - ities. Such pro-acti ve ideation leads to higher project portfolio success. Firms with a risk-taking orientation, prof it more from pro-acti ve ideation practices if the expected g ain is high (K ock et al., 2016). Firms with a sustained innov ation orientation are more likely to in vest in such practices and impro ve them ov er time as innov ation competences. This will allo w them to motiv ate and coordinate better and to learn faster . Overall, we, therefore, e xpect a positi ve moderation ef fect: H2: The r elationship between strate gic clarity and portfolio success is str onger for f irms with an EO that is (a) high in innovativeness and (b) high in risk-taking pr opensity . 2.5. P ortfolio steering Formal control and coordination of a portfolio through regular monitoring of project performance ha ve been repeatedly related to higher portfolio performance (Cooper et al., 2001a; Müller et al., 2008; T eller et al., 2012). Howe ver , steering proj - ects according to the iron triangle of b udget, time, and scope adherence is likely not suf ficient and potentially harmful in the case of highly innov ati ve projects. For e xample, Salomo et al. (2007) show that formalized planning and process control is only benef ical for incremental ne w product de vel - opment projects b ut harmful for highly innov ati ve projects. The more firms adapt an EO, the more they will aim for more inno vati ve and more risk y projects, thus the less useful will be traditional portfolio control mechanisms. K opmann et al. (2015) suggest that instead of monitoring operational project performance, managers should rather control the created v alue, which innov ati ve solutions consequently e xploit, and prefer b usiness case control ov er iron-triangle control. The authors hav e shown that the combi - nation of b usiness planinng ov er the whole proj - ect cycle, clear responsibilities and accountability for the results, as well as result-oriented incen - ti ves increases portfolio success (K opmann et al., 2015). The higher the innov ati veness and risk of the projects in the portfolio, the higher is the like - lihood that the initial b usiness case will change in the course of a project. Therefore, business case monitoring likely becomes more v aluable than in portfolios of incremental, lo w-risk projects. In sup - port of this ar gument, K opmann et al. (2015) find that the impact of b usiness case control on port - folio success increases when the f irm en vironment is characterized by strong technological and mar - ket-related changes. W e, therefore, assume: H3: The r elationship between business case monitor - ing and portfolio success is str onger for firms with an EO that is (a) high in innovativeness and (b) high in risk-taking pr opensity . Being able to adapt the portfolio to changing en vironments has been identif ied as an important ability in project portfolio management (Floricel © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 7 and Ibanescu, 2008; K ock and Gemünden, 2016; Petit, 2012). K ester et al. (2014) accordingly find a positi ve relationship between agility and port - folio success. Arguably , the stronger the en viron - mental dynamism (i.e., the higher the uncertainty and unpredictability of future market and technol - ogy de velopments), the more rele v ant will agility become for f irms. Since rapid change and unpredictability provide opportunities for f irms b ut also make e xisting busi- ness obsolete, f irms in dynamic en vironments more likely adopt an EO. The meta-analysis of Rosenbusch et al. (2013) conf irms this by finding a strong posi- ti ve relationship between EO and en vironmental dynamism. W e, therefore, assume that being able to quickly adapt the portfolio to ne w opportunities or risk will be e ven more adv antageous for f irms adopt- ing an EO (K ester et al., 2011). Firms with a strong EO observe their en vironment more carefully and recognize changes earlier , so they are more lik ely to make timely decisions and inform their or ganization about the necessary measures for adaptation. These changes are enabled by flexible resources, a high strategic and operational transparenc y , and a shared understanding that learning from mistakes is neces- sary – conditions that are more likely present in an or ganization with a strong EO (Lumpkin and Dess, 1996). W e, therefore, argue: H4: The r elationship between agility and portfolio success is str onger for firms with an EO that is (a) high in innovativeness and (b) high in risk-taking pr opensity . 3. Method 3.1. Sample W e test the proposed hypotheses on a cross-industry sample of f irms. The b usiness unit’ s innov ation proj - ect portfolio is the unit of analysis. For each portfolio, we contacted two informants of dif ferent manage - ment le vels. The senior management informant had decision authority ov er the project portfolio regarding initiation, prioritization, and termination of projects. T ypicial titles of senior managers were CEO, head of b ussiness unit, or head of R&D. The middle manage - ment informant had a good ov erview of the portfo - lio and the management processes used in the f irm. Middle managers had titles such as portfolio manag - ers, innov ation managers, or head of project manage - ment of fice. By contacting two informants in each f irm, we obtained dif fering perspecti ves within the f irm’ s hierarchy and reduced common method bias. W e contacted medium-sized and large German f irms, explained the study , and requested participa - tion. After the mailing, we made follo w-up phone calls to identify the correct informants. Registered informants recei ved an e-mail with a letter explain - ing the multi-informant design and the question - naires with an introduction describing the terms and def initions. Again, follo w-up phone calls ensured increased participation. T o provide an incenti ve for participation, we promised an indi vidualized report and an in vitation to a practitioner conference, where the study results were presented. W e recei ved 268 senior manager questionnaires and 279 middle man - ager questionnaires from 286 f irms, resulting in 261 matched dyads with data from both types of infor - mants. Some questionnaires had missing data; thus, the f inal sample comprised 257 firms. W e did not find any signif icant dif ferences between the first 25% and the last 25% of responding f irms in any v ariable used in this study ( P > 0.05), so response bias most lik ely did not af fect the results. T able 1 sho ws some char - acteristics of the sample f irms and their project port - folios. The firms were from di verse industries and reflecti ve of a reasonable spread according to size. 3.2. Measur ement W e used multi-item scales for the constructs, which were taken from e xisting literature and in some cases adapted to the context of IPPM. Decision makers assessed the dependent and moderator v ari - ables and coordinators assessed the independent v ariables. This approach reduced common method v ariance because different informants assessed dependent and independent v ariables. W e v ali - dated the scales using conf irmatory factor analysis T able 1. Sample characteristics Industry Re venue Automoti ve 26% <100 million € 24% Electronics/IT 18% 100–500 million € 28% Finance 16% 501–2,000 million € 20% Construction and utility 11% >2,000 million € 28% Health care 8% Logistics 7% Pharmaceuticals/ chemicals 5% Others 9% Employees Portfolio b udget <500 37% <10 million € 26% 500–2,000 28% 10–30 million € 21% >2,000 35% 30–100 million € 26% <100 million € 27% © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 8 R&D Management 2020 (CF A). Cronbach’ s Alpha and composite reliabil - ity is used to assess scale reliability with accept - able v alues larger than 0.7. The CF A confirmed the measurement model and the second-order structure of portfolio success. P ortfolio success was measured as a multidimen - sional second-order construct using dimensions and their items from existing literature (Jonas et al., 2013; T eller and K ock, 2013; V oss and K ock, 2013): strategy implementation (four items), portfolio balance (three items), a verage project outcome (four items), and syner gy exploitation (four items). T able 2 contains the results of the CF A, which sho ws an acceptable f it ( χ 2 = 126.88 (df = 61; P < 0.00); RMSEA = 0.065; SRMR = 0.055; CFI = 0.97). Similar to pre vious research on portfolio management (K ock et al., 2015), the results suggest that portfolio success is a multidimensional construct. W e also nomologically v alidated the construct by relating it to business unit performance, which was measured by three items assessing ov erall business success, sales gro wth, and prof itability in comparison to competitors (alpha: 0.78). The two constructs sho wed a high correlation (0.38, P = 0.000), which giv es further indication to the v alidity of our portfolio success measure. Stakeholder in volvement determines the degree to which dif ferent portfolio stakeholders hav e the possibility to engage in and af fect the dev elop - ment of the portfolio strategy . Three items adapted from T urner and Zolin (2012) were used. Strate gic clarity was measured using a three-item scale that assessed whether the f irm had a comprehensible and well communicated strategy . The items were based on a related scale de veloped by Bates et al. (1995). W e measured business case monitor - ing with three items from K opmann et al. (2015). Agility describes the extent to which a f irm is able to change and adapt its portfolio to changing con - ditions (K ester et al., 2014). Items were taken from K ock and Gemünden (2016). The innovativeness dimension of EO is the for - ward-looking predisposition to engage in creati vity and experimentation, characterized by the introduc- tion of ne w products ahead of the competition. W e measured innov ati veness with three items (Anderson et al., 2015). Risk taking in v olves taking bold actions by venturing into the unkno wn and committing resources to ventures in uncertain en vironments. W e measured risk-taking propensity using three items (K ock et al., 2016). T able 2. Confirmatory f actor analysis for project portfolio success Construct / Dimension /Item F actor loading Project portf olio success (second-order construct) Strate gy implementation (Cr onbach’ s α = 0.88) 0.82 The project portfolio is consistently aligned with the future of the company 0.85 The corporate strategy is implemented ideally through our project portfolio 0.93 Resource allocation to projects reflects our strategic objecti ves 0.78 The implementation of the strategy is considered a great success in the or ganization 0.74 P ortfolio balance ( α = 0.86) 0.64 Ther e is a good balance in our pr oject portfolio… … between ne w and old areas of application 0.86 … between ne w and existing technologies 0.92 A verag e pr oduct success ( α = 0.82) 0.62 Please assess the avera ge success of completed pr ojects: Our products/project results achie ve the tar get costs defined in the project 0.57 Our products/project results achie ve the planned mark et goals (e.g., market share) 0.66 Our products/project results achie ve the planned prof itability goals (e.g., R OI) 0.95 Our products achie ve the planned amortization period 0.84 Syner gy exploitation ( α = 0.77) 0.73 During the project ex ecution, dev elopment synergies (e.g., shared use of modules, platforms, tech- nologies etc.) between projects are rigorously exploited 0.80 After project completion, exploitation syner gies (e.g., shared marketing/sales channels, infrastruc- ture, etc.) between projects are rigorously exploited 0.85 W e hardly e ver ha ve double work or redundant de velopment 0.60 7-Likert-type Scale; χ 2 =126.88 (df=61; P <0.00); RMSEA = 0.065; SRMR = 0.055; CFI=0.97; n =256. © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 9 W e controlled for three variables that might af fect portfolio success. First, we included formal - ization , which is def ined as the extent to which the portfolio management process is clearly def ined and specif ied. Pre vious research has sho wn that formal - ization af fects portfolio success and captures the maturity of project portfolio management (Cooper et al., 2001a; Martinsuo and Lehtonen, 2007; T eller et al., 2012). It is, therefore, necessary to control for portfolio management formalization when in vestig ating the performance ef fect of strategic antecedents to portfolio success, so that observed ef fects are not only due to differences in portfolio management maturity . The items were tak en from pre vious research (T eller et al., 2012) and were assessed by the middle manager . Furthermore, we control for f irm size, measured as the logarithm of the number of employees. Lar ger firms might dif - fer in their portfolio management approaches and also their strategy processes. Finally , we control for portfolio size, measured as the logarithm of the portfolio b udget in million Euros, to account for the importance of the portfolio. T able 3 shows the results of the CF A for all inde - pendent v ariables and T able 4 displays all variables’ descripti ves. The a verage v ariance extracted and composite reliability sho wed values abo ve 0.5 and 0.7, respecti vely . Overall, the measures sho wed an acceptable reliability and v alidity according to the standards proposed by Bagozzi and Y i (1988). W e further tested for discriminant v alidity by examin - ing the square root of the a verage v ariance extracted for each construct. All the v alues were greater than the respecti ve correlations with other constructs, supporting suf ficient discriminant v alidity . 4. Results W e used hierarchical regression to test the proposed hypotheses. T able 5 presents the results in nine dif- ferent models with portfolio success as dependent v ariable. Model 1 includes control variables and the direct ef fects of the independent and moderator v ariables. Regarding controls, only project portfolio management formalization was positi vely related to portfolio success (unstandardized regression coef f i- cient b = 0.05, P = 0.086), while f irm size and port- folio b udget were not. Confirming pre vious research, we found that management practices along the phases of the portfolio process were related to port- folio success: the coef ficients of stakeholder in volv e- ment ( b = 0.21, P = 0.000), strategic clarity ( b = 0.08, P = 0.032), b usiness case monitoring ( b = 0.06, P = 0.043), and agility ( b = 0.09, P = 0.030) were all pos- iti ve and signif icant. Innov ati veness w as positi vely related to portfolio success ( b = 0.20, P = 0.000), while the direct ef fect of risk taking was not signif- icant. This partly corresponds to the meta-analytical results by Rauch et al. (2009), who f inds a stronger positi ve ef fect of innov ati veness and proacti veness than of risk taking. The ov erall model explains 34% of the v ariance in portfolio success and serves as the base model to test the hypothesized interaction ef fects. Models 2 to 5 include the interaction ef fects between the management practices and the EO dimension innov ati veness. W e mean-centered each of the interacting v ariables and built product terms that were subsequently introduced in the models. Innov ati veness signif icantly moderated the associa- tion of stakeholder in volv ement ( b = 0.07, P = 0.032), b usiness case monitoring ( b = 0.08, P = 0.004), and agility ( b = 0.08, P < 0.027) with portfolio success, respecti vely . Innov ativ eness, howe ver , did not sig- nif icantly moderate the relationship between strate- gic clarity and portfolio success ( b = 0.04, P = 0.201). Models 6 to 9 include the interaction ef fects with risk taking. W e did not find a signif icant interaction with stakeholder in volv ement ( b = 0.05, P = 0.130). Ho wev er , risk taking positi vely moderated the rela- tionship between portfolio success and strategic clar - ity ( b = 0.06, P = 0.032), b usiness case monitoring ( b = 0.08, P = 0.002), and agility ( b = 0.07, P = 0.031). Overall, the empirical data support all h ypotheses except 1b and 2a. W e use plots to illustrate the nature of the sig- nif icant interactions. Instead of referring to sim- ple slope plots, we apply mar ginal plots that sho w the mar ginal ef fects of the independent v ariable for each possible v alue of the moderator variable. This allo ws an assessment over all moderator v alues and the determination of the v alue of the moderator v ariable, at which the marginal ef fects become sig- nif icant or changes direction. Figure 2 shows all rel- e vant mar ginal plots, the short-dashed lines represent 95%-conf idence interv als for the marginal ef fect. The long-dashed lines sho w at which value the conf i- dence interv al touches zero and the marginal ef fects changes in signif icance. It can be seen, for example, that already for a relati vely lo w v alue of approxi- mately three on the innov ati veness scale (mean is 4.2), the ef fect of stakeholder in volv ement becomes signif icant. Overall, the plots sho w that all in vesti- gated portfolio management v ariables’ performance ef fect disappears for firms with belo w-av erage v alues in innov ati veness and risk taking. In the case of b usi- ness case monitoring, the relationship with portfolio © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 10 R&D Management 2020 success e ven becomes neg ati ve for f irms with an extremely lo w entrepreneurial orientation. 5. Discussion The objecti ve of this study was to in vestigate, whether and ho w a firm’ s strategic orientation le ver - ages the performance impact of strategic inno vation project portfolio management practices. Overall, the results conf irm pre vious IPPM research that the in vestig ated practices (i.e., stakeholder in volv ement, strategic clarity , business case monitoring, and agil- ity) are positi vely related to portfolio success. The f indings are also in line with pre vious research that a f irm’ s strategic orientation, specif ically its EO, is an important antecedent to success (Rauch et al., 2009). More precisely , innov ativ eness is directly related to portfolio success, b ut risk taking is not. This demon- strates the rele vance of EO for inno v ation portfolio management. The most important finding, ho we ver , is that EO is an important contingency f actor for the performance of strategic portfolio management practices. Results sho w that both components of EO hav e positi ve moderating ef fects in three of four postulated cases, meaning they both le verage the ef f icacy of port - folio structuring and portfolio steering management T able 3. Confirmatory f actor analysis for independent v ariables Construct /Item Factor loading Stakeholder in volvement (Cr onbach α = 0.86 ) All ke y stakeholders ha ve been engaged in de veloping the portfolio strategy or ha ve had the op- portunity to influence it 0.92 All stakeholders ha ve been gi ven the opportunity to e xpress their views on the project portfolio strategy 0.98 All ke y people engaged in portfolio projects kno w who decided their objectiv es 0.60 Strategic clarity ( α = 0.86) W e hav e a written mission, long-term goals and strategies for implementation 0.80 Goals and strategies are communicated in our compan y 0.89 Our long-term competiti ve strate gy is clear and understandable 0.79 Business case monitoring ( α = 0.83) W e check the business case for v alidity at specified points in time or e vents in the course of the project and adjust if necessary 0.83 Once a project is approv ed a revie w of the objectiv es is rare. (rev ersed) 0.59 W e check on a regular basis for each b usiness case whether the necessary conditions are still valid 0.94 Agility ( α = 0.82) W e quickly adapt our project portfolio to changing customer needs and competiti ve conditions 0.83 W e quickly adapt our project portfolio to changing resource situations 0.69 W e quickly adapt our project portfolio to ne w technologies 0.73 W e quickly adapt our project portfolio to changing strategic goals 0.71 Innov ativeness ( α = 0.72) Through the introduction of innov ation we always try to be one step ahead of our competitors 0.63 W e rely more on radical (high degree of no velty) than on incremental (continuous impro vement) innov ation 0.66 W e often break ne w ground (e.g., technologically) with our projects 0.81 Risk taking ( α = 0.71) W e are not afraid to take risks when we ha ve to mak e significant portfolio decisions 0.67 W e frequently support projects, e ven if the e xpected market success is uncertain 0.57 W ithin our strategic boundaries we are prepared to tak e high risks 0.85 PM f ormalization ( α = 0.93) Essential project decisions are made within clearly def ined portfolio meetings 0.70 Our project portfolio management process is di vided in clearly defined phases 0.90 Our process for project portfolio management is clearly specif ied 0.94 Overall, we e xecute our project portfolio management process in a well-structured way 0.94 7-Likert-type Scale; PM = Portfolio Management; χ 2 = 381.21 (df = 209; P < 0.00); RMSEA = 0.057; SRMR = 0.058; CFI = 0.95; n = 257. © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 11 practices. In case of the practice b usiness case mon - itoring, the influences are signif icantly negati ve for very lo w le vels of inno vati veness or risk taking and become signif icantly positi ve for higher le vels. The moderation ef fects are, therefore, substantial and EO’ s component risk taking cannot be neglected, despite its non-signif icant main ef fect. This is an import - ant f inding for the use of strategic IPPM practices. Business case monitoring appears to unfold its impact only if the f irm is willing to in vest additional mone y and to take more risks to seize promising opportuni - ties. The benefits outlined in a b usiness case require a moti vation to reach ambitious goals and to implement solutions, once a proof-of-concept is gi ven. The two non-signif icant moderation effects deserve further e xplanation. W e deri ved se veral ar gu- ments that EO should positi vely moderate strategic clarity’ s ef fect b ut did not find signif icant support for the innov ati veness dimension. In the frame work by Locke and Latham (2002), goal clarity and goal dif ficulty are considered as dri vers, which direct and moti vate goal-oriented beha vior and the persistence of ef forts. Howe ver , the effect of goal clarity is nearly twice as high for simple tasks as for complex tasks (Locke and Latham, 2002, p. 209). If we assume that innov ati ve tasks are more dif f icult this implies that we should expect a signif icant ne gative moderation ef fect. Locke and Latham argue that in more comple x tasks a lar ger v ariety of strategies are applied – and that influence of goal setting on performance can only work if ef fective task strategies are used. They mak e a plea to assign learning goals for ef fectiv e task strat- egies instead of performance goals. In the deri v ation of our hypothesis we made a plea for learning prac- tices, that is, implementing ideation pipelines to f ind better task strategies, structuring inno vation f ields for scoping strategic b uckets, and de velop visions, which moti vate b ut leav e open a v ariety of task strategies. W e argued that not goal clarity itself, b ut the pro- cesses of de veloping sub-goals and learning goal-at- tainment strategies are important. Ho we ver , we hav e not measured this v ariable in our test – there is room for future research to do this. It is interesting that risk taking positi vely mod- erates strategic clarity . A high strategic clarity also implies that a strategy is focused. This may imply a higher risk, particularly in innov ati ve situations, where strategies are not v alidated by experience. Implementing such strategies implies that the deci- sion makers are willing to tak e a higher risk, because they trust in their strate gic reasoning. The interac- tion with innov ati veness is signif icantly positi ve. An explanation might be that an innov ati ve task moti- v ates stakeholders to cooperate because they see more alternati ves that support a win-win-distrib ution of expected returns. T able 4. Descripti ves V ariables (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (1) Portfolio success 1.00 (2) Firm size (ln) −0.06 1.00 (3) Portfolio b udget (ln) 0.01 0.36 1.00 (4) PM formalization 0.24 0.08 0.05 1.00 (5) Stakeholder in volv ement 0.43 −0.07 0.04 0.30 1.00 (6) Strategic clarity 0.26 0.00 0.09 0.11 0.14 1.00 (7) Business case monitoring 0.25 0.06 0.10 0.20 0.14 0.28 1.00 (8) Agility 0.37 −0.09 −0.13 0.30 0.32 0.23 0.24 1.00 (9) Innov ati veness 0.30 −0.04 −0.11 −0.10 0.08 0.08 0.05 0.24 1.00 (10) Risk taking 0.17 −0.06 −0.01 −0.09 0.11 0.09 0.01 0.21 0.42 1.00 Mean 4.51 6.82 3.48 4.82 5.25 5.39 4.10 3.97 4.20 4.14 Standard de viation 0.83 1.97 1.67 1.66 1.23 1.27 1.51 1.18 1.05 1.14 Minimum 1.81 2.30 0.00 1.00 1.33 1.67 1.00 1.25 1.33 1.33 Maximum 6.60 11.54 7.31 7.00 7.00 7.00 7.00 6.50 6.67 7.00 Cronbach’ s alpha − − − 0.93 0.86 0.86 0.83 0.82 0.72 0.71 Composite reliability − − − 0.93 0.88 0.87 0.84 0.83 0.74 0.74 A verage v ariance extracted − − − 0.77 0.72 0.69 0.64 0.55 0.50 0.50 n =257; PM=portfolio management; all correlations larger than 0.12 are signif icant at the 5%-lev el. © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 12 R&D Management 2020 In contrast, the interaction of stakeholder in volv e- ment and risk taking was not signif icant. W e assume that f irms will more intensi vely in volv e market- and technology-related stakeholders, if the y hav e created trust with these partners, and their pre vious actions ha ve been successful. If so, a willingness to in vest more in a ne w joint activity w ould be dri ven by the prospects of this acti vity , and innov ativ eness might be a dri ver of v alue creation. The willingness to take more risks may not be as decisi ve because the sharing of resources and expected returns may already limit expected g ains and losses – compared to an acti vity that the f irm would do without a partner requiring higher in vestments. 5.1. Implications T o the best of our knowledge this is the f irst study that in vestig ates strategic orientation as a contin- gency f actor for IPPM practices. The results support the proposition that portfolio management capabili- ties aligned to the f irm’ s strategic orientation enable T able 5. Results Project portfolio success (1) (2) (3) (4) (5) (6) (7) (8) (9) Contr ols Firm size (ln) −0.02 −0.01 −0.02 −0.02 −0.02 −0.01 −0.02 −0.02 −0.02 Portfolio b udget (ln) 0.01 0.02 0.02 0.01 0.01 0.02 0.02 0.03 0.01 PM formalization 0.05 † 0.05 † 0.05 † 0.06* 0.04 0.05 † 0.05 † 0.06* 0.05 Independent variables Stakeholder in volv ement 0.21** 0.20** 0.20** 0.20** 0.21** 0.20** 0.20** 0.19** 0.21** Strategic clarity 0.08* 0.07* 0.08* 0.08* 0.07* 0.07* 0.09* 0.08* 0.07* Business case monitoring 0.06* 0.06* 0.06* 0.05 0.06* 0.06 † 0.06* 0.05 † 0.07* Agility 0.09* 0.10* 0.09* 0.09* 0.10* 0.10* 0.09* 0.11* 0.10* Moderator s Innov ati veness 0.20** 0.19** 0.19** 0.22** 0.20** 0.20** 0.20** 0.21** 0.20** Risk taking −0.00 −0.00 −0.00 −0.01 −0.01 −0.00 −0.01 −0.03 −0.01 Interactions with inno vativeness Stakeholder in volv ement 0.07* Strategic clarity 0.04 Business case monitoring 0.08** Agility 0.07* Interactions with risk taking Stakeholder in volv ement 0.05 Strategic clarity 0.06* Business case monitoring 0.08** Agility 0.07* Constant 4.32** 4.26* 4.30** 4.31** 4.32** 4.29** 4.29** 4.26** 4.33** R 2 0.34 0.35 0.35 0.36 0.35 0.35 0.35 0.37 0.35 R 2 (adjusted) 0.32 0.33 0.32 0.34 0.33 0.32 0.33 0.34 0.33 Delta R 2 0.01 0.00 0.02 0.01 0.00 0.01 0.03 0.01 F 14.24** 13.47** 13.01** 14.02** 13.51** 13.11** 13.47** 14.28** 13.47** Hierarchical OLS regression; n = 257; mean-centered variables; unstandardized re gression coeff icients are reported; PM = Portfolio Management. † P < 0.10 (two-sided), * P < 0.05 (two-sided), ** P < 0.01 (tw o-sided). © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 13 f irms to better implement their strategy and generate competiti ve adv antage. This paper , therefore, inte- grates and contrib utes to both literatures on portfolio management and entrepreneurial orientation. First, pre vious work on portfolio manage - ment stresses that portfolio management practices lar gely depend on the context and calls for more work on contingenc y factors for ef fecti ve portfo - lio management (Blomquist and Müller , 2006; Martinsuo, 2013). In response, studies ha ve in ves - tigated important contingenc y factors such portfo - lio complexity (T eller et al., 2012; V oss and K ock, 2013; K opmann et al., 2015), portfolio size (V oss and K ock, 2013; K opmann et al., 2015), the type of projects (Müller et al., 2008; V oss and K ock, 2013), or en vironmental turb ulence (Müller et al., 2008; Petit, 2012; V oss and K ock, 2013; K opmann et al., 2015). Although one of the most important objec - ti ves in portfolio management is the implementa - tion of strategies, surprisingly , no previous study on portfolio management has in vestigated strate gic contingency f actors. W e sho w that certain strategic success factors of IPPM increase in importance for f irms with a high EO. This means that although f irms with a high EO do not necessarily in vest more resources and ener gy to increase the intensity of IPPM practices (EO and IPPM factors did not strongly correlate), they can ef fecti vely le verage Figure 2. Marginal plots of interaction ef fects (dotted lines are 95%-CI intervals). © 2020 The Authors. R&D Management published by RADMA and John W iley & Sons Ltd Ale xander K ock and Hans Geor g Gemünden 14 R&D Management 2020 their benef its. More importantly , as the marginal plots in Figure 2 suggest, a certain threshold of EO is necessary for IPPM practices to ha ve an y effect at all. Kno wn success factors, may thus become irrele vant for f irms with a conservati ve orientation. This study , therefore, contributes to a better under - standing of the boundary conditions for success - ful innov ation project portfolio management and sho ws that success factors can be further le veraged by an appropriate strategic orientation. These find - ings may inspire further research to identify other le veraging factors such as or ganizational culture or the coherence and f it between managerial practices. Second, researchers of the EO-performance relationship try to identify the conditions under which EO contrib utes to firm performance. Based on their meta-analysis, Rauch et al. (2009) call for more research on possible moderators on the EO-performance relationship. Our results also con - trib ute to this stream of literature by introducing a portfolio management perspecti ve to this f ield. Certain project portfolio management practices bet - ter support implementation of a more entrepreneur - ially oriented strategy . Put differently , if a f irm stri ves to adopt a more entrepreneurial posture, it is useful to kno w which practices at the middle management le vel are necessary to optimally complement this pos - ture. Future research in vestig ating the performance ef fects of strategic orientations should, therefore, also consider the implementation-related aspects of strat - egy , for example, practices of portfolio management. This study has also some important managerial implications. Portfolio managers need to be a ware that there are no uni versally successful IPPM practices, b ut that practices should fit the conte xt. Managers need to consider the f irm’ s strategic orientation when they try to f ind the optimal port - folio gov ernance and align managerial practices accordingly . In other words, they do not neces - sarily ha ve to further intensify these practices to increase success, b ut they can le verage the ef fec - ti veness of IPPM practices by nurturing an EO. V ice versa, it does not pay of f to in vest in IPPM practices if the f irm’ s EO has not reached a certain minimum threshold. Specif ically , if the firm has a highly innov ati ve strate gic posture, the integra - tion of portfolio stakeholders becomes one of the most important success factors. As can be seen in Figure 2, the relationship with portfolio success is almost twice as strong for f irm’ s high in the inno - v ativ eness dimension of EO as compared to f irms of a verage inno vati veness posture. F or f irms with a highly risk-af fine posture, a clearly formulated strategy becomes e ven more rele v ant for portfolio success. Generally , business case monitoring and agility become more important for higher le vels of EO. Ho wev er , b usiness case monitoring might not be benef icial in all circumstances. W ith decreasing EO in either dimension, the positi ve ef fect of b usi - ness case monitoring diminishes and e ventually e ven becomes neg ati ve. Since establishing b usiness case control for all projects is connected with con - siderable ef forts (K opmann et al., 2015), it might, therefore, not be worth the ef fort in firms with a relati vely lo w EO, and managers should concen - trate their ef forts on other practices. 5.2. Limitations and avenues for futur e r esear ch There are a fe w limitations worth noting when interpreting this study’ s f indings. First, the data are cross-sectional and based on subjecti ve assessments by ke y informants. While we tried to reduce com - mon method bias using multiple informants for dif - ferent constructs, we cannot prov e the causality with cross-sectional models. In addition, although or study in vestig ates EO as a contingency v ariable, a firm’ s strategic orientation is not e xogenous and depends on en vironmental conditions (Rosenb usch et al., 2013) or e ven on past success. Pre vious studies on IPPM ha ve in vestigated the rele v ance of en vironmental v ari - ables such as turb ulence (e.g., K ock and Gemünden, 2016), b ut future research on IPPM could consider the f it between EO and en vironmental conditions. Second, our analysis concentrated on four central managerial practices along the portfolio process: in v olving portfolio stakeholders, formulating a clear strategy , monitoring the portfolio using business cases, and adapting the portfolio to changes. While these constructs represent core strategic acti vities in the portfolio formation and steering phases and jointly explain a lar ge variance in portfolio suc - cess, other non-process-related v ariables could be considered. Future research could in vestig ate, for example, ho w EO influences the ef fecti veness of leadership, teamwork or competence de velopment in innov ation project portfolio en vironments. Refer ences Ahmad, S., Mallick, D.N., and Schroeder , R.G. (2013) Ne w product de velopment: impact of project characteristics and de velopment practices on performance. J ournal of Pr oduct Innovation Mana gement , 30 , 2, 331–348. Ancona, D.G. and Caldwell, D.F . 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R&D Management published by RADMA and John W iley & Sons Ltd How entr epr eneurial orientation can lever ag e innovation R&D Management 2020 17 W u, W .Y ., Chang, M.L., and Chen, C.W . (2008) Promoting innov ation through the accumulation of intellectual cap- ital, social capital, and entrepreneurial orientation. R&D Manag ement , 38 , 3, 265. Dr . Alexander K ock is a professor of technology and innov ation management at the T echnische Univ ersität Darmstadt, Germany . His research interests include or ganizational issues of innov ation and project man - agement, especially the management of project port - folios, highly innov ati ve projects, the front end of innov ation, and uni versity-industry collaboration. His work is published in v arious journals, includ - ing the Journal of Product Innov ation Management, IEEE T ransactions on Engineering Management, R&D Management, International Journal of Project Management, and Project Management Journal. Dr . Hans Georg Gemünden is a Professor emer - itus of T echnology and Innov ation Management of TU Berlin in the Faculty of Economics and Management and a Professor emeritus of Project Management at BI Norwegian Business School in the Department of Leadership and Or ganization. He holds a Diploma and a Doctorate in Business Administration from the Uni versity of the Saarland in Saarbrücken, and a Habilitation de gree and an honorary doctorate from the Uni versity of Kiel. He has recei ved se veral A wards of Excellence for his research, which is published in refereed journals including, among others Or ganization Science, Research Policy , Journal of Product Innov ation Management, Creati vity and Innov ation Management, International Journal of Research in Marketing, IEEE T ransactions on Engineering Management, R&D Management, International Journal of Project Management, and Project Management Journal. 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