Objective One of the important consequences of the Second Demographic Transition has been the increasing complexity of families. The aim of this project is to study how rising family complexity has affected two fundamental aspects of intergenerational relationships: reproduction and solidarity. Theoretically, family complexity is distinguished into four dimensions: (a) the length, timing and nature of exposure to the child, (c) biological relatedness to the child, and (c) characteristics of parent-parent ties (triadic effects), (d) characteristics of the wider family network. Using insights from several disciplines, I develop a common theoretical framework for understanding intergenerational reproduction and solidarity. To test the theory, an innovative multiactor survey is developed with an oversampling strategy in which for each adult child, information is collected on all parent figures, and for each parent, information on all adult children. In addition, register data are used to analyze one aspect of reproduction in a dynamic fashion (educational reproduction) and vignette data are used to analyze one aspect of solidarity in more depth (norms prescribing solidarity). By studying reproduction and solidarity as outcomes, I shift the traditional focus from examining how the SDT has affected individual well-being, to the question of how the SDT has affected relationships. In doing so, I analyze a new problem in demography and sociology and contribute to classic debates about population ageing and social inequality. Theoretically, the study of family complexity yields unique opportunities to test ideas about the nature of intergenerational relationships and will shed new light on the traditional dichotomy of social vis-à-vis biological bases of intergenerational relationships. Methodological innovation is made by developing solutions for well-known problems of multiactor data, thereby strengthening the theoretical relevance of survey data for the social sciences. Fields of science social sciencespolitical sciencespolitical policiescivil societynongovernmental organizationssocial sciencessociologydemographysocial sciencespolitical sciencespolitical transitionsrevolutionssocial sciencessociologysocial issuessocial inequalitiessocial sciencespsychology Keywords Intergenerational solidarity social stratification educational inequality divorce intergenerational relationships life course multipartner fertility Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Topic(s) ERC-ADG-2014 - ERC Advanced Grant Call for proposal ERC-2014-ADG See other projects for this call Funding Scheme ERC-ADG - Advanced Grant Host institution KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN - KNAW Net EU contribution € 204 124,46 Address KLOVENIERSBURGWAL 29 HET TRIPPENHUIS 1011 JV AMSTERDAM Netherlands See on map Region West-Nederland Noord-Holland Groot-Amsterdam Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 204 124,46 Beneficiaries (3) Sort alphabetically Sort by Net EU contribution Expand all Collapse all KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN - KNAW Netherlands Net EU contribution € 204 124,46 Address KLOVENIERSBURGWAL 29 HET TRIPPENHUIS 1011 JV AMSTERDAM See on map Region West-Nederland Noord-Holland Groot-Amsterdam Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 204 124,46 CENTRAAL BUREAU VOOR DE STATISTIEK Netherlands Net EU contribution € 833 970,00 Address HENRI FAASDREEF 312 2492 JP DEN HAAG See on map Region West-Nederland Zuid-Holland Agglomeratie ’s-Gravenhage Activity type Public bodies (excluding Research Organisations and Secondary or Higher Education Establishments) Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 833 970,00 UNIVERSITEIT VAN AMSTERDAM Participation ended Netherlands Net EU contribution € 1 461 438,54 Address SPUI 21 1012WX Amsterdam See on map Region West-Nederland Noord-Holland Groot-Amsterdam Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 1 461 438,54