SOEP-IS 2018 - BIOBIRTH: Birth biography of female and male respondents

DIW Berlin / SOEP (Ed.) Research Report SOEP-IS 2018 - BIOBIRTH: Birth biography of female and male respondents SOEP Survey Papers, No. 839 Provided in Cooperation with: German Institute for Economic Research (DIW Berlin) Suggested Citation: DIW Berlin / SOEP (Ed.) (2020) : SOEP-IS 2018 - BIOBIRTH: Birth biography of female and male respondents, SOEP Survey Papers, No. 839, Deutsches Institut für Wirtschaftsforschung (DIW), Berlin This Version is available at: https://hdl.handle.net/10419/219063 Standard-Nutzungsbedingungen: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen. 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If the documents have been made available under an Open Content Licence (especially Creative Commons Licences), you may exercise further usage rights as specified in the indicated licence. https://creativecommons.org/licenses/by-sa/4.0/ 839 SOEP Survey Papers Series D – Variable Descriptions and Coding SOEP — The German Socio-Economic Panel at DIW Berlin 2020 SOEP-IS 2018—BIOBIRTH: Birth Biography of Female and Male Respondents SOEP-IS Group Running since 1984, the German Socio-Economic Panel (SOEP) is a wide-ranging representative longitudinal study of private households, located at the German Institute for Economic Research, DIW Berlin. The aim of the SOEP Survey Papers Series is to thoroughly document the survey’s data collection and data processing. The SOEP Survey Papers is comprised of the following series: Series A – Survey Instruments (Erhebungsinstrumente) Series B – Survey Reports (Methodenberichte) Series C – Data Documentation (Datendokumentationen) Series D – Variable Descriptions and Coding Series E – SOEPmonitors Series F – SOEP Newsletters Series G – General Issues and Teaching Materials The SOEP Survey Papers are available at http://www.diw.de/soepsurveypapers Editors: Dr. Jan Goebel, DIW Berlin Prof. Dr. Stefan Liebig, DIW Berlin and Freie Universität Berlin Dr. David Richter, DIW Berlin Prof. Dr. Carsten Schröder, DIW Berlin and Freie Universität Berlin Prof. Dr. Jürgen Schupp, DIW Berlin and Freie Universität Berlin Dr. Sabine Zinn, DIW Berlin Please cite this paper as follows: SOEP-IS Group, 2020. SOEP-IS 2018—BIOBIRTH: Birth Biography of Female and Male Respondents. SOEP Survey Papers 839: Series D – Variable Descriptions and Coding. Berlin: DIW Berlin/SOEP This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. © 2020 by SOEP ISSN: 2193-5580 (online) DIW Berlin German Socio-Economic Panel (SOEP) Mohrenstr. 58 10117 Berlin Germany [email protected] The German Socio Economic Panel at DIW Berlin SOEP-IS 2018—BIOBIRTH: Birth Biography of Female and Male Respondents SOEP-IS Group 2020 The file biobirth is part of a collection, which is released with doi:10.5684/soep.is.2018. SOEP Innovation Sample (2018) biobirth (2018) Contents 1 Population and purpose of the data set BIOBIRTH 4 2 Structure of the data set 4 3 Information basis of the birth biography 5 4 A source of biographical information (waves O to BB) - the youth questionnaire 5 5 Identification process of the children in the SOEP data base 6 6 Identification of the children for male/female respondents with biographical data 6 7 Identificaton of the children for male/female respondents who have no biography data/ not completed the biography questionnaire 6 8 Last step of the identification process 7 9 Updating biobirth 7 10 Variables in File BIOBIRTH 7 cid – Original Household Number ............................... 7 pid – Never Changing Person ID ................................ 7 sex – Sex ............................................ 7 biovalid – Birth Biography Information ............................ 7 bioyear – Year Of Biography Survey .............................. 8 bioage – Age When Surveyed Biography ........................... 8 sumkids – Total Number Of Births ............................... 9 biokids – Number Of Births From Biography .......................... 9 kidpnr01 – PID 1. Child ..................................... 10 kidpnr02 – PID 2. Child .................................... 10 kidpnr03 – PID 3. Child .................................... 10 kidpnr04 – PID 4. Child .................................... 10 kidpnr05 – PID 5. Child .................................... 11 kidpnr06 – PID 6. Child .................................... 11 kidpnr07 – PID 7. Child ..................................... 11 kidpnr08 – PID 8. Child .................................... 11 kidpnr09 – PID 9. Child .................................... 11 kidpnr10 – PID 10. Child .................................... 11 kidpnr11 – PID 11. Child .................................... 12 kidpnr12 – PID 12. Child .................................... 12 kidpnr13 – PID 13. Child .................................... 12 kidpnr14 – PID 14. Child .................................... 12 kidpnr15 – PID 15. Child .................................... 12 kidgeb01 – Year Of Birth 1st. Child .............................. 13 kidgeb02 – Year Of Birth 2nd. Child .............................. 13 kidgeb03 – Year Of Birth 3rd. Child .............................. 14 kidgeb04 – Year Of Birth 4th. Child .............................. 15 kidgeb05 – Year Of Birth 5th. Child .............................. 15 kidgeb06 – Year Of Birth 6th. Child .............................. 16 kidgeb07 – Year Of Birth 7th. Child .............................. 17 SOEP Survey Papers 839 2 SOEP Innovation Sample (2018) biobirth (2018) kidgeb08 – Year Of Birth 8th. Child .............................. 17 kidgeb09 – Year Of Birth 9th. Child .............................. 18 kidgeb10 – Year Of Birth 10th. Child ............................. 18 kidgeb11 – Year Of Birth 11th. Child .............................. 18 kidgeb12 – Year Of Birth 12th. Child ............................. 18 kidgeb13 – Year Of Birth 13th. Child ............................. 19 kidgeb14 – Year Of Birth 14th. Child ............................. 19 kidgeb15 – Year Of Birth 15th. Child ............................. 19 kidsex01 – Sex 1st. Child .................................... 19 kidsex02 – Sex 2nd. Child ................................... 19 kidsex03 – Sex 3rd. Child .................................... 20 kidsex04 – Sex 4th. Child ................................... 20 kidsex05 – Sex 5th. Child ................................... 20 kidsex06 – Sex 6th. Child ................................... 20 kidsex07 – Sex 7th. Child .................................... 20 kidsex08 – Sex 8th. Child ................................... 21 kidsex09 – Sex 9th. Child ................................... 21 kidsex10 – Sex 10th. Child ................................... 21 kidsex11 – Sex 11th. Child ................................... 21 kidsex12 – Sex 12th. Child ................................... 22 kidsex13 – Sex 13th. Child ................................... 22 kidsex14 – Sex 14th. Child ................................... 22 kidsex15 – Sex 15th. Child ................................... 22 kidmon01 – Month Of Birth 1st. Child ............................. 22 kidmon02 – Month Of Birth 2nd. Child ............................ 23 kidmon03 – Month Of Birth 3rd. Child ............................ 23 kidmon04 – Month Of Birth 4th. Child ............................ 24 kidmon05 – Month Of Birth 5th. Child ............................ 24 kidmon06 – Month Of Birth 6th. Child ............................ 25 kidmon07 – Month Of Birth 7th. Child ............................ 25 kidmon08 – Month Of Birth 8th. Child ............................ 25 kidmon09 – Month Of Birth 9th. Child ............................ 26 kidmon10 – Month Of Birth 10th. Child ............................ 26 kidmon11 – Month Of Birth 11th. Child ............................ 27 kidmon12 – Month Of Birth 12th. Child ............................ 27 kidmon13 – Month Of Birth 13th. Child ............................ 28 kidmon14 – Month Of Birth 14th. Child ............................ 28 kidmon15 – Month Of Birth 15th. Child ............................ 28 SOEP Survey Papers 839 3 SOEP Innovation Sample (2018) biobirth (2018) 1 Population and purpose of the data set BIOBIRTH The file BIOBIRTH covers the following information: (1) sum, year of birth and sex of the biological children of a male/female respondent up to the last date of interview (2) Person identifier (KIDPNR[n]) of the children (provided the child can be identified) which corresponds to variable PID in file PPFAD. BIOBIRTH is based on every male/female respondent who has ever had at least one successful SOEP or IS interview. For each of these respondents, the data set BIOBIRTH documents the birth biography with one row per respondent in the dataset. The annual update focuses on including information on new births collected in the individual questionnaire or in the biographical questionnaire. Furthermore respondents who have been interviewed for the first time but who gave no information on births yet are included. The latter are either new household members or teenagers who have reached the required minimum for a SOEP-IS participation (16 years). For that reason BIOBIRTH can be described as an accumulative data set, in which the entire birth biography of all SOEP-IS respondents is presented. 2 Structure of the data set BIOBIRTH contains the following variables for all male/female respondents: • CID Invariable number of the original household • PID Invariable personal number of the male/female respondent • BIOVALID Status of the birth biography: 10: no birth biographical entries. 20: youth biography questionnaire completed, no children in biography. 30: birth biography questionnaire completed, no children in biography. 31: birth biography questionnaire completed, one or more children in biography. • BIOYEAR Year of the survey of the birth biography, respectively “-2” for respondents without information stemming from this special survey instrument. • BIOAGE Age of the respondent at the time of the birth biography survey. If no birth biographical information is available yet, the age at the very first survey is indicated. • SUMKIDS Total number of children born (more precisely: total number of children identifiable within SOEP-IS by merging all available data up to the time of the last observation). • BIOKIDS Total number of children identified through the birth biography. For respondents who haven’t filled in the birth biographical questionnaire yet, the code “-2” applies. • KIDGEB[n] Year of birth of the children (for the first child up to the fifteenth child). • KIDSEX[n] Sex of the children (for the first child up to the fifteenth child). • KIDPNR[n] Personal number of the children (for the first child up to the fifteenth child), in so far as it is identifiable in the SOEP-IS. • KIDMON[n] Month of birth of a child (for the first child up to the fifteenth child). For the variables KIDGEB[n], KIDSEX[n], KIDPNR[n], and KIDMON[n] identical missing codes apply: The code “-2“ is assigned if there’s no [n]th child found for this male/female parent. The code “-1” applies if information about the [n]th child is found but information about the year of birth or the sex is missing or the child could not be identified by a personal identifier (“pid”) within the SOEP-IS. For every male/female respondent, a maximum of 15 entries for children is provided, although the biography questionnaire enables only ten possible entries regarding birth information. If there have been additional births up to the time the biography questionnaire is SOEP Survey Papers 839 4 SOEP Innovation Sample (2018) biobirth (2018) collected, they are recorded separately by the interviewer and are included in BIOBIRTH. The sequence of children within BIOBIRTH is recorded with regards to the age of the children. The oldest child is recorded under KIDPNR01 the second oldest under KIDPNR02 and so on. If the age is missing the lowest personal identifier applies. 3 Information basis of the birth biography The main basis of the individual birth biography in BIOBIRTH is normally the information collected by the biography questionnaire, in which the number, year of birth and sex of the biological children for every male/female respondent are collected. For respondents with information on children stemming from the biography questionnaire the BIOVALID code “31” is assigned. Respondents who completed this questionnaire but did not report on any births receive the code “30”. In addition, the variable BIOAGE contains the age at the time of the collection of the life history. Apart from this one-time collection within the scope of the first SOEP interview, there is no other possibility in SOEP to collect information on the number, the residence status, or if appropriate, the year of death of children who were born before the first SOEP-IS interview. A minority of male/female respondents have no information from the biographical questionnaire due to several reasons. In this cases the variable BIOVALID has the code “10” and the variable BIOAGE contains the age at the first time of SOEP-IS interview. The group can be divided into different sub-populations and is in principle affected by the risk of underestimating the total number of births: • Respondents who were at the time of the first interview only 16 years old. In most cases these respondents participate at a later date in the biography survey. Thus, the parent-child relationship recorded earlier in BIOBIRTH can be checked later with the birth biography. • Respondents who are 30 years old or younger at the first interview. In this sub-population, children are not yet adults and live in most cases in the parents’ household. Since information from the biographical questionnaire is missing, a final distinction in social and biological children is not possible. • Respondents who are over 30 years old at the time of the first interview. Some of the children don’t live any more in the parents’ household at the time of the first interview and therefore they are not part of the survey population. For that reason the number of biological children might be underestimated in this group of respondents (over 30 years) to a larger extent compared to younger respondents. 4 A source of biographical information (waves O to BB) - the youth questionnaire The youth questionnaire is handed out in the waves O to BB, whereas SOEP-IS does not provide this questionnaire. With regard to wave O to BB, 74 female and 71 male respondents filled out the youth questionnaire. In view of the relatively small number of cases in SOEP-IS, further information are provided in BIOBIRTH documentation of the SOEP. Nevertheless, a few changes to the BIOBIRTH data-set have to be outlined: • In the variable BIOVALID a new code (“20”: “youth biography questionnaire completed”) is added. As the youth questionnaire doesn’t contain any information about own children the addendum “no children in biography” is always added to the code “20”. • While calculating the age at the time of the biographical questionnaire (BIOAGE), the age upon completion of the youth questionnaire is applied. SOEP Survey Papers 839 5 SOEP Innovation Sample (2018) biobirth (2018) • The variable BIOKIDS always remains at zero as no biographical information on parenthood can be derived from the youth-biography (in this cases no missing code is applied in BIOKIDS). 5 Identification process of the children in the SOEP data base The starting point for the process of identifying children is the relationship of a household member to the head of the household (HH) (variable STELL in the file PBRUTTO). There are only certain combinations among household members in which a biological parent-child relationship among an adult and another person can be assumed. For the remaining unassigned children within a household a thorough check is performed to scan for parent-child ties that can be derived from more complex household relationships. It should be noted here that the larger the number of persons living in a household, the more complicated the relationships become among the individual household members. For that reason only the combination of the information from the biography questionnaire with the information from PBRUTTO (and in most cases the mother indicator K_PMUM provides the most reliable definition of a biological mother-child relationship. 6 Identification of the children for male/female respondents with biographical data If a respondent mentioned the birth, the sex and of year of birth of a child in the biography questionnaire, the identification process has been started. In the first step, the program identified the respondents’s relationship to the reference person and looked on the basis of the parent-child combination - as illustrated abovefor a potential child in the household. If the year of birth and the sex of this person are the same as named in the life history interview of the assumed parent, the person has been identified as the child of this parent. Since the majority of the households with children present small nuclear families including one potential mother and/or father, this kind of identification process was completely sufficient. In other, rather complex households a careful hand editing has been examined, in order to identify the ‘right’ child to the ‘right’ mother and/or father. The same has been done, if the sex or the important information – the year of birth - of a child mentioned in the biography questionnaire of a respondent was missing. In the case of a successful identification the variable KIDPNR[n] has been filled with the person identifier of this child. Children, for whom the respondent in the biography questionnaire has reported that they were deceased or had moved out, were assigned the personal number (KIDPNR[n]) “-1”, for missing information, in BIOBIRTH. 7 Identificaton of the children for male/female respondents who have no biography data/ not completed the biography questionnaire To get as close as possible to the definition of a biological child, specific relationships among household members were allowed. Since the main important information – from the biography questionnaire - is missing, a careful analysis of the composition and the history of the household in which the children live has been examined, in order to assign the ‘right’ child to the ‘right’ mother and/or father. SOEP Survey Papers 839 6 SOEP Innovation Sample (2018) biobirth (2018) -6 [-6] Questionnaire version with modified filtering 0 kidgeb01 – Year Of Birth 1st. Child 1927 1 1933 1 1935 1 1940 3 1941 1 1942 2 1943 1 1944 4 1945 4 1946 2 1947 6 1948 8 1949 9 1950 26 1951 15 ... (59 rows omitted) 7297 2011 80 2012 87 2013 89 2014 60 2015 31 2016 61 2017 71 2018 32 2019 1 -1 [-1] No Answer 47 -2 [-2] Does not apply 4136 -3 [-3] Answer improbable 2 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb02 – Year Of Birth 2nd. Child 1932 1 1941 1 1944 1 1945 1 1947 1 1948 3 1949 2 1950 2 1951 7 1952 11 1953 7 1954 10 SOEP Survey Papers 839 13 SOEP Innovation Sample (2018) biobirth (2018) 1955 21 1956 22 1957 26 ... (52 rows omitted) 4823 2010 104 2011 72 2012 77 2013 66 2014 35 2015 25 2016 44 2017 36 2018 28 -1 [-1] No Answer 30 -2 [-2] Does not apply 6622 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb03 – Year Of Birth 3rd. Child 1938 1 1945 1 1949 1 1951 4 1952 2 1953 3 1954 6 1955 5 1956 2 1957 5 1958 10 1959 9 1960 8 1961 22 1962 18 ... (47 rows omitted) 1642 2010 44 2011 36 2012 27 2013 30 2014 24 2015 4 2016 23 2017 26 2018 9 -1 [-1] No Answer 17 -2 [-2] Does not apply 10099 -3 [-3] Answer improbable 0 SOEP Survey Papers 839 14 SOEP Innovation Sample (2018) biobirth (2018) -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb04 – Year Of Birth 4th. Child 1949 1 1955 3 1956 4 1957 6 1958 2 1959 3 1960 6 1961 1 1962 5 1963 12 1964 8 1965 8 1966 17 1967 13 1968 9 ... (40 rows omitted) 416 2009 11 2010 19 2011 18 2012 17 2013 7 2014 12 2015 2 2016 8 2017 5 -1 [-1] No Answer 7 -2 [-2] Does not apply 11458 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb05 – Year Of Birth 5th. Child 1955 1 1957 1 1958 2 1959 1 1960 1 1961 7 1962 1 1963 4 1964 2 1965 4 SOEP Survey Papers 839 15 SOEP Innovation Sample (2018) biobirth (2018) 1966 1 1967 8 1968 5 1969 1 1970 3 ... (32 rows omitted) 112 2009 4 2010 7 2011 3 2012 7 2013 7 2014 3 2016 5 2017 1 2018 1 -1 [-1] No Answer 2 -2 [-2] Does not apply 11884 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb06 – Year Of Birth 6th. Child 1960 1 1961 2 1963 2 1965 1 1966 1 1967 6 1968 1 1970 2 1971 1 1972 2 1974 2 1975 3 1979 2 1980 2 1983 2 ... (12 rows omitted) 16 2003 1 2004 2 2005 1 2006 2 2008 5 2010 3 2011 2 2012 2 2018 2 -1 [-1] No Answer 1 SOEP Survey Papers 839 16 SOEP Innovation Sample (2018) biobirth (2018) -2 [-2] Does not apply 12011 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb07 – Year Of Birth 7th. Child 1964 1 1966 1 1967 1 1969 1 1970 2 1971 1 1976 1 1983 2 1986 3 1987 1 1991 1 1997 2 1999 1 2000 1 2004 1 2006 2 2007 1 2008 1 2009 1 2011 2 2014 1 -1 [-1] No Answer 1 -2 [-2] Does not apply 12049 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb08 – Year Of Birth 8th. Child 1969 2 1974 1 1986 3 1990 1 1997 1 2000 2 2005 1 2006 1 2010 1 -1 [-1] No Answer 2 -2 [-2] Does not apply 12063 -3 [-3] Answer improbable 0 SOEP Survey Papers 839 17 SOEP Innovation Sample (2018) biobirth (2018) -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb09 – Year Of Birth 9th. Child 1976 1 1992 1 2002 1 2014 1 -1 [-1] No Answer 1 -2 [-2] Does not apply 12073 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb10 – Year Of Birth 10th. Child 1977 1 1986 1 1990 2 1994 2 2003 1 2004 1 2016 1 -1 [-1] No Answer 1 -2 [-2] Does not apply 12068 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb11 – Year Of Birth 11th. Child -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb12 – Year Of Birth 12th. Child -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 SOEP Survey Papers 839 18 SOEP Innovation Sample (2018) biobirth (2018) -6 [-6] Questionnaire version with modified filtering 0 kidgeb13 – Year Of Birth 13th. Child -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb14 – Year Of Birth 14th. Child -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidgeb15 – Year Of Birth 15th. Child -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex01 – Sex 1st. Child 1[1] Male 4177 2[2] Female 3750 -1 [-1] No Answer 15 -2 [-2] Does not apply 4136 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex02 – Sex 2nd. Child 1[1] Male 2798 2[2] Female 2645 -1 [-1] No Answer 13 -2 [-2] Does not apply 6622 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 SOEP Survey Papers 839 19 SOEP Innovation Sample (2018) biobirth (2018) -6 [-6] Questionnaire version with modified filtering 0 kidsex03 – Sex 3rd. Child 1[1] Male 959 2[2] Female 1012 -1 [-1] No Answer 9 -2 [-2] Does not apply 10098 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex04 – Sex 4th. Child 1[1] Male 296 2[2] Female 318 -1 [-1] No Answer 6 -2 [-2] Does not apply 11458 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex05 – Sex 5th. Child 1[1] Male 107 2[2] Female 86 -1 [-1] No Answer 1 -2 [-2] Does not apply 11884 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex06 – Sex 6th. Child 1[1] Male 28 2[2] Female 39 -1 [-1] No Answer 0 -2 [-2] Does not apply 12011 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex07 – Sex 7th. Child 1[1] Male 10 SOEP Survey Papers 839 20 SOEP Innovation Sample (2018) biobirth (2018) 2[2] Female 19 -1 [-1] No Answer 0 -2 [-2] Does not apply 12049 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex08 – Sex 8th. Child 1[1] Male 3 2[2] Female 10 -1 [-1] No Answer 2 -2 [-2] Does not apply 12063 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex09 – Sex 9th. Child 1[1] Male 2 2[2] Female 2 -1 [-1] No Answer 1 -2 [-2] Does not apply 12073 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex10 – Sex 10th. Child 1[1] Male 7 2[2] Female 2 -1 [-1] No Answer 1 -2 [-2] Does not apply 12068 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex11 – Sex 11th. Child 1[1] Male 0 2[2] Female 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 SOEP Survey Papers 839 21 SOEP Innovation Sample (2018) biobirth (2018) -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex12 – Sex 12th. Child 1[1] Male 0 2[2] Female 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex13 – Sex 13th. Child 1[1] Male 0 2[2] Female 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex14 – Sex 14th. Child 1[1] Male 0 2[2] Female 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidsex15 – Sex 15th. Child 1[1] Male 0 2[2] Female 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 kidmon01 – Month Of Birth 1st. Child SOEP Survey Papers 839 22 SOEP Innovation Sample (2018) biobirth (2018) 7[7] July 0 8[8] August 0 9[9] September 0 10 [10] October 0 11 [11] November 0 12 [12] December 0 -1 [-1] No Answer 0 -2 [-2] Does not apply 12078 -3 [-3] Answer improbable 0 -4 [-4] Inadmissible multiple answer 0 -5 [-5] Not contained in questionnaire 0 -6 [-6] Questionnaire version with modified filtering 0 SOEP Survey Papers 839 29