Rethinking the income inequality and financial development nexus. A study of nine OECD countries

sustainability Article Rethinking the Income Inequality and Financial Development Nexus. A Study of Nine OECD Countries Marta de la Cuesta-González 1,* , Cristina Ruza 1and JoséM. Rodríguez-Fernández 2 1Economic and Business Faculty, UNED (National University of Distance Education), C/Senda del Rey 11, 28040 Madrid, Spain; [email protected] 2Economic and Business Faculty, University of Valladolid Av. Valle de Esgueva, 6, 47011 Valladolid, Spain; [email protected] *Correspondence: [email protected] Received: 8 June 2020; Accepted: 29 June 2020; Published: 6 July 2020   Abstract: Sustainable finance seeks to increase the contribution of finance to sustainable and inclusive growth. The global financial crisis of 2008 provoked the return of inequality in advanced countries to levels typical of a century ago. The aim of this paper is to empirically analyze the relationship between finance and income inequality for a group of nine OECD countries over the pre-crisis and post-crisis periods (2000–2015). The model proposed in this study simultaneously considers two explanatory variables for measuring financial depth (credit provision and capital markets) and a new multidimensional variable to measure the financial system’s resilience (a composite indicator), and conducts panel data analysis. The empirical results confirm that in terms of financial depth, the "too much finance hypothesis" holds. We also find that financial system’s resilience helps alleviate existing income inequality and that income inequality appears higher in liberal market economies than in coordinated economies. These results encourage policymakers to look beyond traditional public redistribution interventions and to pay attention to other financial variables related to the financialization process, the behavior of financial intermediaries, and the specific environment in which they operate. Keywords: sustainable finance; income inequality; financial depth; resilience; composite indicator; financial crisis; coordinated and liberal market economies 1. Introduction Sustainable finance seeks to increase the contribution of finance to sustainable growth. The financial inclusion induced by banks contributes positively to financial stability and to reduce income inequality [ 1 ]. Up to date, the literature has widely analyzed the financial and economic growth relationship, where the financial system traditionally has been considered to have a positive impact. However, little attention has been paid to the analysis of whether the economic growth generated is sustainable or inclusive. Since the pioneering studies of Blank and Blinder [ 2 ] and Cutler and Katz [ 3 ], there has been an academic consensus that recession leads to increases in inequality. The scant empirical evidence available seems to show that the negative impact of economic recessions on the situation of low-income households is considerably higher than the positive impact of the expansive phases of the economy [4]. Financial crises have devastating effects in terms of income inequality because low-income households are the most vulnerable group to any shock that adversely affects the financial system, and provokes a situation of credit rationing or even financial exclusion [ 5 ]. Malinen [ 6 ] emphasizes the relevance of the channel of credit provision at the origin of crises in developed economies. The financial Sustainability 2020,12, 5449; doi:10.3390/su12135449 www.mdpi.com/journal/sustainability Sustainability 2020,12, 5449 2 of 18 crisis that started in 2008 provoked the return of inequality in advanced countries to levels typical of a century ago. Income inequality has increased in recent years, especially in advanced economies [ 7 ], and it is expected to get worse as a consequence of the Covid-19 pandemic crisis. Recent studies present arguments linking income inequality to the financial crash. Some authors support the view that the “financialization process” experienced over the last decades decisively contributed to the global financial crisis. Over-funding has exerted a negative influence which questions the Schumpeter’s statement that financial deepening generally stimulates economic development [ 8 , 9 ]. Excessive financial intensification entails risks of over-indebtedness and the deflation of assets, which in the past were the dominant factors in the origin of the great economic turbulence [ 10 , 11 ]. Financial capital is understood as a merchandise that its suppliers try to make profitable, and it is no longer seen as a resource that generates productive activity. Therefore, the production of money through money becomes an ordinary channel of wealth generation, and it produces unequal opportunities and risks [ 12 ]. The relative importance of income from private properties and capital investments has substantially increased over the last decades, especially in the case of rich families [ 13 ]. This wealth disparity is the main reason for the existing income gap and has raised concerns about its economic and social consequences [14]. On these grounds, the debate about the impact of financial systems on economic growth and sustainable development has been reopened to analyze if there is a degree of financial depth beyond which there are no more positive benefits in terms of growth and investment, but still significant costs in terms of inequality, financial fragility, and sustainability. Recent studies find that financial development contributes to lower inequality up to a point [ 15 , 16 ], but as financial development proceeds further, it contributes to higher inequality [ 17 ]. Other studies empirically investigate the effects of financial development on incomes within various income groups in the same country and demonstrates a positive but non-linear effect indicating that promoting a balanced financial development would help to ease the income gap between country residents [ 18 ]. In economic literature, the more commonly used empirical proxies for financial depth have been the credit extended by commercial banks to the private sector (as percentage of Gross Domestic Product (GDP) [ 19 ] and the relative size of capital markets [ 20 ]. However, Cihak et al. [ 21 ] also highlight the importance of the multidimensional nature of financial systems and show that if we focus on only one characteristic—for example, financial depth or financial stability—this approach would be too narrow and miss important characteristics of the dynamics of modern financial systems. Some theoretical papers have identified structural, behavioral, and institutional factors that ultimately affect the resilience of the financial system as a key issue to be considered [ 22 , 23 ]. In line with EU Commission Action Plan on sustainable finance [ 24 ], we try to determine which financial variables contribute more to a resilient system and to long-term sustainable development. In this article, we consider simultaneously the quantitative importance of the financial system (traditional approaches based on financial depth), and the qualitative assessment of the financial system’s resilience. Specifically, this paper tries to answer three questions: i) does financial depth (through credit or market capitalization) affect income inequality? ii) is the resilience of the financial system relevant to inequality? and iii) what is the relationship between these variables and inequality (linear or nonlinear)? To answer these questions, we carry out a panel data analysis for a group of nine OECD advanced economies during the period 2000–2015. As resilience cannot be directly measured, we identify the variables to measure it and construct a financial system’s resilience composite index [ 25 ]. We also want to determine if the model of capitalism (liberal markets economies and coordinated market economies) and the financial crisis are affecting the level and the dynamics of income inequality. The empirical results confirm the "Too much finance hypothesis" [ 26 ] for the credit provision variable (a U-shaped relationship); a positive relationship between market capitalization and income inequality, and a negative relationship between financial system’s resilience and income inequality. Sustainability 2020,12, 5449 3 of 18 To our knowledge, this is the first study to consider the multidimensional nature of the financial system and to empirically analyze its relationship with income inequality, including quantitative and qualitative assessments. The paper points out the need for policy makers to closely monitor financial intermediaries’ behavior and the environment where they operate in order to ensure that the whole financial system exerts a positive role in terms of income inequality and sustainable development. Our paper contributes to sustainable finance research and to the scarce literature about the specific relationship between financial development and income inequality in the specific case of developed countries. The paper is organized as follows: the second section reviews the literature and presents the contradictory results about the relationship between financial depth, financial resilience and income inequality, which lead us to establish different hypotheses of analysis for each of the variables considered; the third section describes the sample, variables, and methodological issues and we describe the procedure used to construct the composite resilience index and the panel data estimation process. The empirical results are presented in the fourth section. The paper ends with some discussion and concluding remarks, which will be useful for practitioners and policy makers aim at improving the contribution of financial intermediaries to sustainable and inclusive development goals. 2. Theoretical Discussion and Empirical Evidence 2.1. Financial Depth (Credit Provision) and Income Inequality. Traditionally, there have been identified three types of links between inequality and financial systems: an extensive link (through wider financial access), an intensive link (through improved quality of services for those who are already included in the financial system) and an indirect link (through the labor market) [27]. Credit provision affects inequality because it benefits corporate access to finance, so the extent to which the low-income group can benefit from this source of finance will result in lower levels of income inequality. The provision of credit to households will foster consumption levels based on low-income families’ higher marginal propensity to consume. The higher consumption is, the higher the aggregated output of a country and the higher the levels of employment. If the new labor demand is for low-skilled profiles, the poor will enjoy better chances to find a job, contributing to lower levels of inequality [ 28 ]. Overall, higher credit availability allows households to make decisions based on the efficient allocation of spending over time, regardless of their inherited wealth. The advocates of this narrowing effect of financial depth on income inequality argue that more-developed financial systems enhance reductions in income inequality because in the presence of market imperfections, people can borrow only limited amounts [29]. Finance-induced growth may be pro-poor by expanding employment opportunities, but it may also favor entrepreneurs and their profit margin. It usually brings relatively larger benefits to those at the lower end of the income distribution [30–32]. However, in the opposite direction, some studies have found a widening impact of financial depth in terms of income inequality. This effect seems especially clear in advanced economies and in recent years [7,33,34]. One channel through which the widening of income inequality takes place is the easy access to finance that ultimately could lead to a situation of overindebtedness. Some studies [ 35 – 37 ] confirm this statement and find that excessive levels of indebtedness are responsible for the persistent income inequalities in the U.S. Other authors show that the relationship between the financial system and income inequality is greater in countries with weak collective bargaining, little labor protection, and shareholder corporate governance, commonly referred to as liberal market economies (LMEs) [38]. More recent theoretical models analyze the ways in which the financial system can increase income inequality by allowing larger rent extraction [ 39 ], i.e., the booming remuneration of senior executives Sustainability 2020,12, 5449 4 of 18 and the proportion of salaries to the total income [ 40 ]. The financialization process [ 41 ], with the rising dominance of financial instruments and financial actors [ 42 ], appears to be a factor behind the increase in inequality in OECD countries. Other authors considering nonlinear patterns find an inverted U-shaped relationship [ 43 ] between financial depth and inequality, with a turning point that occurs when the credit to the private sector reaches 114% of GDP [ 44 ] or 82% of GDP [ 45 ]. This is called a detrimental-to-beneficial pattern [ 15 , 16 , 39 ]. The inverted U-shaped relationship has also been demonstrated in studies with various income groups inside a country, showing a greater influence in the extremes (low-income and high-income groups) [ 18 ]. However, in tune with the “too much finance hypothesis” (U-shaped pattern), some studies have found that although in the early stages of financial development, the role played by the financial system is positive and contributes to narrowing the income-inequality gap, there is a threshold beyond which further financial deepening will lead to a reverse effect, and inequality will start to rise [ 20 , 46 , 47 ]. Recent studies on OECD and EU countries have shown that the impact of bank credit on inequality could depend on the gap between the real interest rate and the GDP growth rate [17]. According to these contradictory results, we can establish four alternative hypotheses as follows: Hypothesis 1a: Credit provision has a negative and significant impact on income inequality (Inequality narrowing hypothesis). Hypothesis 1b: Credit provision has a positive and significant impact on income inequality (Inequality widening hypothesis). Hypothesis 1c: There is an inverted U-shaped relationship between credit provision and income inequality (Detrimental-to-beneficial pattern). Hypothesis 1d: There is a U-shaped relationship between credit provision and income inequality (Too much finance hypothesis). 2.2. Financial Depth (Capital Markets) and Income Inequality Regarding the relationship between capital markets and income inequality, the literature reviewed shows that the emergence of a new corporate governance view with an increasing focus on short-term profits gives firms the incentive to cut labor costs while rewarding the top executives who make such decisions, thus fostering income inequality [ 8 ]. In addition, as stock prices increase, the gains are disproportionately distributed to the wealthy, thereby further widening the unequal distribution of income [ 5 , 48 , 49 ]. Income inequality is also likely to deepen when a stock bubble bursts. At the beginning of a boom, the investors entering the stock markets tend to have high income and benefit more from the abnormal returns. Later investors entering the market have low or medium income, so they suffer more severe losses when the bubble bursts [ 8 ]. Stock market capitalization has been the driving force of inequality in the EU-27 since 1995 [ 50 ] and in Eastern and Central European countries during 2000–2014 [ 51 ]. It seems that the effects of capital markets on inequality are only weakly positive and short-lived [52]. Another stream of the literature finds that the relationship between capital markets and income inequality is better captured when nonlinear dynamics that follow a U-shaped [ 39 , 53 ] or inverted U-shaped pattern [54] are considered. According to these results we can establish two alternative hypotheses as follows: Hypothesis 2a: Financial market capitalization has a positive and significant impact on income inequality (Inequality widening hypothesis). Hypothesis 2b: There is a non-linear relationship between financial market capitalization and income inequality. Sustainability 2020,12, 5449 5 of 18 2.3. Financial System’s Resilience and Income Inequality Some authors find significant evidence in favor of a positive relationship between financial fragility and income inequality in developed countries during the period 1995–2015 [ 55 ]. Financial fragility is the opposite to financial resilience, a term that has entered the debate among academics and policymakers in OECD and EU countries [24,56]. It has been argued that transforming Europe’s economy into a more resilient system requires a process of taking due account of environmental and social considerations (basically inequality and inclusiveness) in investment decision-making. This would lead to increase investments in long-term and sustainable activities [ 24 ]. The European Banking Authority, within the Action Plan on Sustainable Finance, encourages banking institutions to include these considerations into their business strategy and risk management to build resilient and sustainable business models in the long-term [57]. Some authors utilize the central tenets of resilience thinking as a lens through which to assess investing in disaster risk reduction and climate resilience [ 58 ]. Other studies identify resilience with financial health of financial organizations and explore how to include relationships that govern complex systems to the analysis of financial systems exposed to systemic risks [59,60]. Bakir [ 23 ] defines financial system’s resilience as the capacity of the financial system to adapt in response to both short-term shocks and long-term changes while continuing to fulfil its functions in serving the real economy [ 61 ]. Financial resilience refers to the behavior of financial intermediaries [ 62 ], the specific environment in which they operate [ 22 , 63 ] and some underlying institutional factors [ 23 ]. Research on financial resilience is a relatively a new field in finance and hence, a consensus has not yet been reached about which factors have the most influence on resilience [25]. Ruza et al. [ 64 ] review the main studies analyzing and measuring resilience and propose a theoretical and comprehensive framework of financial system’s resilience. They define financial resilience as the capacity of a system not to return to an initial point of equilibrium after a shock but to evolve and move to a new state of equilibrium within a stability domain. Inspired by the New Economics Foundation [ 65 ], the authors summarize the main determinants of financial resilience: the business model followed by banking institutions (asset and liability composition); the structure of the market in which banks operate and the institutional environment and policies that influence banking behavior. These determinants can help prevent, attenuate, or amplify shock propagation, and also impose limits and influence agents’ incentives to engage in risky activities. For example, the high dependence on the source of wholesale funding increases the risk of systemic collapse when confidence in the system disintegrates [ 66 ]. A highly interconnected financial network will serve as a mechanism for shock’s propagation rather than a firewall within a highly globalized system [ 67 , 68 ]. Due to the international exposure of globalized financial institutions, any international shock would find no barrier that impedes it to continue expanding elsewhere [ 69 , 70 ]. The degree of concentration seems also relevant in terms of resilience because it leads to larger institutions, some of which deserve the consideration of super-spreaders of contagion effects due to the complex nature of their activities and their market power [22,46,63,69–73]. Finally, prudential regulation (higher bank’s capital ratios) and monetary and fiscal policies can influence the resilience of the system as they can impose limits to leverage, to certain risky activities (i.e., securitization of banks’ assets) or to agents’ incentives to get into debt (low interest rates or QE monetary policies). In this paper, we assume that financial resilience can contribute to reducing financial fragility and thus reduce income inequality levels [55]. We establish the hypothesis as follows: Hypothesis 3: Financial system’s resilience has a negative and significant impact on income inequality (Inequality narrowing hypothesis). In Table 1, we summarize the contradictory results found in the literature reviewed. Sustainability 2020,12, 5449 6 of 18 Table 1. Main literature review on relationship between finance and inequality. Reference Objective and Sample Methodology Results [34] They analyzed the impact of financial globalization and technological changes in income inequality. Sample: 51 countries, of which 20 are advanced and 31 are developing and emerging countries, and the period covered is 1981–2003. Panel demeaned with time dummies. (+) effect Widening inequality. [74] Theoretical model of market imperfections and indivisibilities in investment in human capital affect “initial distribution of wealth,” which affects “aggregate output” and “investment.” Economic growth equilibrium model (short and long term). (-) effect Narrowing inequality. [75] Financial markets revolution opens the access of the poor everywhere. Sample: Wide sample of countries around the world (1960–1995). Regression (pure cross-sectional analysis; for long-term relationships) and panel data (to test the U-shaped hypothesis) in 5 non overlapping periods. (-) effect Narrowing inequality. [30] Analyzes the impact of financial depth in the distribution of income and changes in both relative and absolute poverty. Sample: 72 developed and developing countries. Ordinary Least Squares (OLS) method; cross-country regressions. (-) effect Narrowing inequality. [43] Analyzes the link of savings, economic growth, financial intermediation, and income inequality. They test the Kuznets hypothesis. Theoretical model of general equilibrium yields a development process consistent. (+/-) effect An inverted U-shaped relationship between financial development and income inequality. [44] Explores a potential dynamic and endogenous relationship between financial sector development and inequality. Sample: developed and developing countries (1962–2006). Dynamic multivariate panel data analysis. Generalized method of moments. Instrumental variable approach (lagged dependent). (+/-) effect An inverted U-curve relationship. The turning point occurs at the point where the credit to the private sector reaches 114% of GDP. [76] Analyzes the relationship between financial depth and gross and net income inequality in a cross-country setting. Sample: 1960–2005 for 72 countries. OLS Mixed results. [45] Financial depth increases income inequality (especially in developed countries). Sample: 138 countries for the period 1960–2008. Panel data analysis. Fixed effects, time dummies. Instrumental variable procedure. Mixed results. [77] How financial depth is related to income distribution. Sample: 22 African countries (1990–2004). Dynamic panel estimation technique (GMM). They used GMM-estimator of Blundell and Bond (1998). Mixed results. [20] Financial depth reduces inequality until a point, and then inequality increases (the impact of financial markets). Sample: 35 developing countries (1980–2000). Dynamic panel models (linear and non-linear) using the two-step GMM estimator provided by Arellano and Bond and a non-linear equation. (-/+) effect Ushaped relationship. Note: Source: Own elaboration. 3. Data and Estimation Method 3.1. Sample, Source of Information, and Variables Our sample includes nine OECD countries. Six of the countries correspond to coordinated economies and three to liberalized economies. We want to see if the model of capitalism that characterizes a specific country affects the level and the dynamics of inequality [78,79]. Sustainability 2020,12, 5449 7 of 18 The reason for choosing these relatively homogeneous set of countries is because we intend to focus on a group of advanced economies in terms of financial development. As it has already been argued in the literature, the relationship between income inequality and financial indicators may vary depending on the stage of financial development. We chose the group of G7 countries (Canada, France, Germany, Italy, Japan, the U.K., the U.S.) and two southern Europe economies (Spain and Portugal) as exponents of advanced countries that during the financial crises received financial help from the EU. Indeed, by focusing solely on advanced countries we would be better able to identify specific patterns related to the “financialization process” of these countries, and identify the main drivers of income inequality, which in a mixed sample of countries would be different [17]. The analysis extends over a period of 16 years (2000–2015), so it covers the pre-crisis and post-crisis periods to reveal any significant differences in the patterns. The series goes as far as common data was available at the time of analysis. Previous studies have often used the Gini coefficient to measure income inequality, either in gross or in net terms. In our study, we decided to include the net Gini as our dependent variable and defined post-tax and post-transfers, so it captures the effect of public redistributive instruments. To do so, we used Solt’s [ 80 ] Standardized World Income Inequality Database (2009), which seems to be the most comprehensive and comparable database of Gini indices among developed countries over time. We introduce two exogenous variables to measure financial depth. The first is the credit provided to the private sector as a percentage of GDP (CREDIT), which reflects the ease with which households and corporations may obtain credit [27,45,75]. The second variable, stock market capitalization as a percentage of GDP (MKCAPITAL), accounts for the increasing importance of financial markets for generating capital gains and improving agents’ financial wealth [20,78,81]. To measure the resilience of the financial system (RESILINDEX), we follow the methodology proposed by Ruza et al. [ 64 ] and construct an updated new composite index. There is no single indicator, or set of indicators, that measures financial resilience. The lack of relevant information to feed the indicators is one of the biggest difficulties faced when we build composite indicators [25]. The variables included in the composite index are those correlated with inequality and according to the sign of this relationship. These variables refer to the way in which banks do business, reflected in their asset and liability composition (bank size, leverage, broad noncore liabilities, credit allocation, inter-financial activity, and international exposure), the structure of the market in which they operate and other characteristics of the financial system influenced by policies and institutional factors (bank concentration, inter-financial activity, securitization exposure, and level of household debt). The dependent and explanatory variables and their sources of information are summarized in Table 3, together with the expected sign for their relationship according to the previously presented hypotheses. Drawing on previous studies, we identify various control variables (see Table 2) to account for other important drivers that might influence income inequality: 1. Ln GDP per capita (LnGDP pc). This variable is included to test whether the Kuznets hypothesis holds within the group of advanced economies. This hypothesis suggests that the relationship between economic development and income inequality follows an inverted U-shape. 2. Public expenditure on health (GEXHEALTH). Equality of opportunity refers to the access to basic health services and the public investments in human assets, such as health, that may augment the productivity of a country and enhance the earnings capacity of its population [82]. 3. Country classification (COUNCLASS). The model of capitalism that characterizes a specific country might affect the level and the dynamics of inequality [ 78 , 79 ]. From the perspective of the varieties of capitalism proposed by Hall & Soskice [ 83 ], capitalist countries can be divided into LMEs and coordinated market economies (CME). LMEs provide stronger shareholder and creditor protection, so they usually promote a market-based model, and the repeated interaction of banks can compensate for reduced creditor protection [39]. Sustainability 2020,12, 5449 8 of 18 4. Banking crisis time (CRISTIME). This is a dummy variable. Following the definition of the World Bank, a banking crisis occurs if the following two criteria are observed: a) significant signs of financial distress in the banking system and b) significant banking policy intervention. The first year in which both criteria are met is considered the start of the crisis (2008), and the crisis ends when both real GDP growth and real credit growth turn positive for two consecutive years. Table 2. Control variables. Variable Definition Source Ln GDP per capita (Ln GDP pc) Neperian logarithm of GDP per capita, constant 2010 US$ World Development Indicators database, World Bank [84] Public expenditure on health (GEXHEALTH) Government’s current expenditure on health to GDP (%) OECD statistics [85]. Country classification (COUNCLASS) Classification of liberal market economies (LME) and coordinated market economies (CME). Hall and Soskice [83]. Banking crisis time (CRISTIME) Dummy variable (0 for years before 2008; 1 for 2008 and the following years) Global Financial Indicators, World Bank [84]. Note: Source: Own elaboration. Table 3. Definition of variables and sources of information. Dependent Variable Net Gini (GINI) Net Gini Coefficient (Post-Tax, Post-Transfer) Source: Standardized World Income Inequality Database (SWIID) [80] Explanatory Variables Variable Definition Hypotheses Expected sign Financial depth (CREDIT) Private credit by deposit banks and other financial institutions to GDP (%) Source: Global financial development database, World Bank [64]. H1.a: Credit provision has a negative and significant impact on income inequality. Negative H1.b: Credit provision has a positive and significant impact on income inequality. Positive H1.c: There is an inverted U-shaped relationship between credit provision and income inequality. Linear term positive and quadratic term negative. H1.d: There is a U-shaped relationship between credit provision and income inequality. Linear term negative and quadratic term positive. Financial market capitalization (MKCAPITAL) Stock market capitalization to GDP (%) Source: Global financial development database, [84] and Fed Reserve Bank of St. Louis. H2a: Financial market capitalization has a positive and significant impact on income inequality. Positive H2b: There is a nonlinear relationship between financial market capitalization and income inequality. Quadratic term. Financial system’s resilience (RESILINDEX) Composite Index of Resilience Source: [64] and own elaboration. H3: Financial system’s resilience has a negative and significant impact on income inequality. Negative Note: Source: Own elaboration. Sustainability 2020,12, 5449 9 of 18 Our unbalanced panel of data consists of nine cross-sections and ten time series over 16 years. 3.2. Methodology The financial system’s resilience index used as an explanatory variable is a composite or synthetic index, defined on a scale between 0 and 100 following the methodological procedure proposed by Freudenberg [ 86 ] and OECD [ 87 ] in terms of: selection of initial indicators or base variables; weighting and aggregation of initial indicators into dimensions or intermediate indicators; and, finally, estimation of the synthetic or composite index by combining the dimensions previously obtained. The base variables (see Table 2) are normalized by applying the minimum-maximum method and were re-elaborated to adjust them to our objectives [ 25 ] considering the sign of the relationship between each variable and resilience. According to multiple-criteria decision making (MCDM) literature, we follow an objective approach to determine the weights of attributes, which can be grouped into three categories: subjective, objective, and integrated [88]. For the weighting and aggregation of the base variables, we choose the STATIS technique (Structuration des Tableaux à Trois Indices de la Statistique) in its dual version, and we use the ACT program included in the statistical package SPAD [ 89 ]. This is a multivariate technique that is used for analyzing multiple matrices or tables of data consisting of continuous variables. There are as many matrices as years, and each matrix is composed of the base variables of the nine countries (end of the year references). The technique is based on a generalization of the method of principal components. The relationships between successive matrices are studied to construct a “compromise matrix” through scalar products that is as close as possible to and representative of the original matrices. Accounting for the weights assigned to each annual matrix, we organize the pooled data and apply principal component analysis with Varimax rotation, to ease the interpretation of the dimensions (principal components) identified and retained. Considering the scree plot, three dimensions are identified and retained, which accounts for 75% of the explained variance (Table 4). Table 4. Principal component analysis with Varimax rotation. Factor Loadings after Varimax Rotation Variables* D1 D2 D3 Market concentration 0.180 –0.446 0.615 Inter-financial linkages 0.374 0.818 0.126 International exposure 0.739 –0.062 0.442 Banking system size 0.908 0.284 0.105 Households’ debt 0.051 0.749 –0.256 Credit allocation 0.661 –0.131 0.579 Broad non-core liabilities 0.707 0.046 –0.162 Securitization 0.115 –0.024 –0.925 Leverage 0.863 0.328 –0.020 Variance (%) 35.998 18.237 20.924 Cumulated variance (%) 35.998 54.235 75.159 Note: Source: Own elaboration. * Variable definitions can be found in Ruza et al. [ 64 ] Varimax is an orthogonal rotation. Loadings can be interpreted as correlations between the variables and the identified components (dimensions D1, D2, and D3). The shaded cells highlight the variables with the highest weight (correlation) in each dimension. Based on this, D1 can be interpreted as the general profile of the banking system (asset and liability composition). D2 and D3 reflect special characteristics of the banking system influenced by policies and institutional factors; D2 express the dependence of banks on the source of wholesale funding and D3 represent the level of oligopolization in the banking system and its effect on securities markets. Sustainability 2020,12, 5449 16 of 18 37. Kumhof, M.; Ranci è re, R. Inequality, Leverage and Crises; Working Paper No. 10/268; IMF: Washington, DC, USA, 2010. 38. Roberts, A.; Kwon, R. Finance, inequality and the varieties of capitalism in post-industrial democracies. Socio-Econ. Rev. 2017,15, 511–538. [CrossRef] 39. Brei, M.; Ferri, G.; Gambacorta, L. Financial Structure and Income Inequality; BIS Working Papers No. 756; Bank of International Settlements: Basel, Switzerland, 2018. 40. Dünhaupt, P. Determinants of Functional Income Distribution: Theory and Empirical Evidence; Working Papers 994841223402676; International Labour Organization: Geneva, Switzerland, 2013. 41. Kwon, R.; Roberts, A. Financialization and income inequality in the new economy: An exploration of finance’s conditional effects. Sociol. Dev. 2015,4, 442–462. [CrossRef] 42. Flaherty, E. Top Incomes under Finance-Driven Capitalism, 1990–2010: Power Resources and Regulatory Orders. Socio-Econ. Rev. 2015,13, 417–447. [CrossRef] 43. Greenwood, J.; Jovanovic, B. Financial development, growth, and the distribution of income. J. Polit. Econ. 1990,98, 1076–1107. [CrossRef] 44. Nikoloski, Z. Financial sector development and inequality: Is there a financial Kuznets curve? J. Int. Dev. 2012,25, 897–911. [CrossRef] 45. Jauch, S.; Watzka, S. Financial Development and Income Inequality: A Panel Data Approach. Empir. Econ. 2016, 291–314. [CrossRef] 46. Loayza, N.; Ouazad, A.; Ranci é re, R. Financial Development, Growth, and Crisis: Is There a Trade-Off?Working Paper, No. 24474; The National Bureau of Economic Research: Cambridge, MA, USA, 2018. 47. Park, D.; Shin, K. Economic Growth, Financial Development, and Income Inequality. J. Emerg. Mark. Trade 2017,53, 2794–2825. [CrossRef] 48. Atkinson, A.B. Inequality: What Can be Done? Harvard University Press: Cambridge, MA, USA, 2015. 49. Li, J.; Ouyang, A.Y. Stock and labor market synchronization and income inequality: Evidence from OECD countries. J. Int. Commer. Econ. Policy 2018,9, 1850003. [CrossRef] 50. Asteriou, D.; Dimelis, S.; Moudatsou, A. Globalization and income inequality: A panel data econometric approach for the EU27 countries. Econ. Model. 2014,36, 592–599. [CrossRef] 51. Neagu, O.; Dumiter, F.; Braica, A. Inequality, Economic Growth and Trade Openness: A Case Study for Central and Eastern European Countries (ECE). Amfiteatru Econ. 2016,18, 557–574. 52. Jeong, K.; Kim, S. Finance, Growth, and Inequality: New Evidence from the Panel VAR Perspective. Seoul J. Econ. 2018,31, 121–143. 53. Nasreddine, K.; Mensi, S. Financial development and income inequality: The linear versus the noninear hypothesis. Econ. Bull. 2016,36, 609–626. 54. Mathew, E. Stock Market amd Income Inequality. Master’s Thesis, Singapore Mangement University, Singapore, 2008. 55. Amountzias, C. An investigation of the effects of income inequality on financial fragility: Evidence from Organization for Economic Co-operation and Development countries. Int. J. Finance Econ. 2019 ,24, 241–259. [CrossRef] 56. Kambhu, J.; Weidman, S.; Krishnan, N. New Directions for Understanding Systemic Risk: A Report on a Conference Cosponsored by the Federal Reserve Bank of New York and the National Academy of Sciences; The National Academies Press: Washington, DC, USA, 2007. 57. European Banking Authority Action Plan on Sustainable Finance 2019. Available online: https://eba.europa. eu/financial-innovation-and-fintech/sustainable-finance (accessed on 1 March 2020). 58. Clarvis, M.H.; Bohensky, E.; Yarime, M. Can Resilience Thinking Inform Resilience Investments? Learning from Resilience Principles for Disaster Risk Reduction. Sustainability 2015,7, 9048–9066. [CrossRef] 59. Haldane, A.; May, R. Systemic Risk in Banking Ecosystem. Nature 2011,469, 351–355. [CrossRef] 60. Chen, N.; Liu, X.; Yao, D.D. An Optimization View of Financial Systemic Risk Modeling: Network Effect and Market Liquidity Effect. Oper. Res. 2016,64, 1089–1108. [CrossRef] 61. Holling, C.S.; Gunderson, L.H. Resilience and adaptive cycles. In Panarchy: Understanding Transformations in Human and Natural Systems; Gunderson, L.H., Holling, C.S., Eds.; Island Press: Washington, DC, USA, 2002; pp. 25–62. Sustainability 2020,12, 5449 17 of 18 62. De la Cuesta, M.; Ruza, C.; Fern á ndez-Olit, B. Banking System and Financial Exclusion: Towards a More Comprehensive Approach. In Liquidity Risk, Efficiency and New Bank Business Models; Carb ó Valverde, S.C.S.P., Rodríguez Fernández, F., Eds.; Palgrave Macmillan: London, UK, 2015; pp. 127–161. 63. UNEP. Effects of Financial System Size and Structure on the Real Economy: What Do We Know and What Do We Not Know? Inquiry Working Paper no 15/10; United Nations Environment Programme: Nairobi, Kenia, 2015. 64. Ruza, C.; De la Cuesta, M.; Paredes, J.D. Banking system resilience and stability: Constructing a composite indicator for developed countries. J. Econ. Stud. 2019,46, 1241–1257. [CrossRef] 65. New Economics Foundation (NEF). Financial System Resilience Index: Building a Strong Financial System; NEF: London, UK, 2015. 66. De Haas, R.T.A. Foreign banks and financial stability: Lessons from the great recession. In Financial Stability in Emerging Markets: Dealing with Global Liquidity; Volz, U., Ed.; German Development Institute: Bonn, Germany, 2012. 67. Brida, J.G.; Matesanz, D.; Seijas, M.N. Network analysis of returns and volume trading in stock markets: The Euro Stoxx case. Phys. A 2016,444, 751–764. [CrossRef] 68. Acemoglu, D.; Ozdaglar, A.; Tahbaz-Salehi, A. Systemic risk and stability in financial networks. Am. Econ. Rev. 2015,105, 564–608. [CrossRef] 69. Greenspan, A. The Crisis; Brookings Papers on Economic Activity; Brookings Institution: Washington, DC, USA, 2010. 70. International Monetary Fund. Morocco; Financial System Stability Assessment: Washington, DC, USA, 2016. 71. Bank of England. One Bank Research Agenda; Discussion Paper: London, UK, 2015. 72. Cecchetti, S.G.; Kharroubi, E. Reassessing the Impact of Finance on Growth; BIS Working Paper No.381; Bank for International Settlements: Basel, Switzerland, 2012. 73. Arcand, J.L.; Berkes, E.; Panizza, U. Too much finance? J. Econ. Growth 2015,20, 105–148. [CrossRef] 74. Galor, O.; Zeira, J. Income Distribution and Macroeconomics. Rev. Econ. Stud. 1993,60, 35–52. [CrossRef] 75. Rajan, R.; Zingales, L. Saving the Capitalism from the Capitalists; Crown Business: New York, NY, USA, 2003. 76. Zielschot, M. Financial Development and Income Inequality: Differentiating between Income Definitions. Master’s Thesis, Tilburg University, Tilburg, The Netherlands, 2013. 77. Batuo, M.E.; Guidi, F.; Mlambo, K. Financial Development and Income Inequality: Evidence from African Countries; Economic Comission for Africa, United Nations: Addis Ababa, Ethiopia, 2010. 78. Antonelli, G.; Pasqualina, P.; Giudetti, G. Approaching an Investigation of Multi-Dimensional Inequality through the Lenses of Variety in Models of Capitalism; Working Paper, No. 984; DSE: Bologna, Italy, 2014. 79. Rehbein, B.; Souza, J. Inequality in Capitalist Societies. Transci. A J. Glob. Stud. 2014,5, 16–27. 80. Solt, F. The Standardized World Income Inequality Database. Soc. Sci. Q. 2016,97, 1267–1281. [CrossRef] 81. Bengtsson, E.; Waldenström, D. Capital Shares and Income Inequality: Evidence from the Long Run. J. Econ. Hist. 2018,78, 712–743. [CrossRef] 82. Lindert, P.H.; Williamson, J.G. Unequal Gains; Princeton University Press: Princeton, NJ, USA, 2016. 83. Hall, P.A.; Soskice, D. Varieties of Capitalism: The Institutional Foundations of Comparative Advantage; Oxford University Press: Oxford, UK, 2001. 84. World Bank. World Development Indicators Database. Available online: https://databank.worldbank.org/ source/world-development-indicators (accessed on 3 March 2019). 85. OECD. Income Distribution Database (IDD): Gini, Poverty, Income, Methods and Concepts; OECD: Paris, France, 2017. 86. Freudenberg, M. Composite Indicators of Country Performance: A Critical Assessment; OECD Science, Technology and Industry Working Papers, No. 2003/16; OECD Publishing: Paris, France, 2003. [CrossRef] 87. The Organization for Economic and Cooperation Development (OECD). Growing Unequal? Income Distribution and Poverty in OECD Countries; OECD: Paris, France, 2008. 88. Korzeb, Z.; Samaniego-Medina, R. Sustainability Performance. A Comparative Analysis in the Polish Banking Sector. Sustainability 2019,11, 653. [CrossRef] 89. Lavit, C.; Escoufier, Y.; Sabatier, R.; Traissac, P. The ACT (STATIS method). Comput. Stat. Data Anal. 1994 ,18, 97–119. [CrossRef] 90. Peters, W.S.; Butler, J.Q. The construction of regional economic indicators by principal components. Ann. Reg. Sci. 1970,4, 1–14. [CrossRef] Sustainability 2020,12, 5449 18 of 18 91. Nicoletti, G.; Scarpetta, S.; Boylaud, O. Summary Indicators of Products Market Regulation with An Extension to Employment Protection Legislation; Economics Department Working Papers no. 226; OECD Publishing: Paris, France, 2000. 92. Romano, O.; Ercolano, S. Who Makes the Most? Measuring the “Urban Environmental Virtuosity”. Soc. Indic. Res. 2013,112, 709–724. [CrossRef] 93. Arellano, M.; Bond, S. Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations. Rev. Econ. Stud. 1991,58, 277–297. [CrossRef] 94. Wooldridge, J.M. Econometric Analysis of Cross Section and Panel Data; MIT Press: Cambridge, MA, USA, 2002; ISBN 978-0-262-23258-6. 95. Bellemare, M.F.; Masaki, T.; Pepinsky, T.B. Lagged Explanatory Variables and the Estimation of Causal Effect. J. Polit. 2017,79, 949–963. [CrossRef] 96. Baum, C.F.; Schaffer, M.E.; Stillman, S. IVREG2: Stata Module for Extended Instrumental Variables/2SLS and GMM Estimation; Boston College Department of Economics: Boston, MA, USA, 2019. 97. Tsagkanos, A. Stock market development and income inequality. J. Econ. Stud. 2017,44, 87–98. [CrossRef] 98. Philippon, T. Financiers versus Engineers: Should the Financial Sector Be Taxed or Subsidized? Am. Econ. J. Macroecon. 2010,2, 158–182. [CrossRef] 99. Philippon, T.; Resheff, A. Wages and Human Capital in the U.S. Finance Industry: 1909–2006. Q. J. Econ. 2012,127, 1551–1609. [CrossRef] © 2020 by the authors. Licensee MDPI, Basel, Switzerland. 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