Join to connect? Voluntary involvement, social capital, and socioeconomic inequalities

Access to social capital is stratified by socioeconomic status and has been cross-sectionally linked to involvement in voluntary organizations. Yet, we know little about the origin and interplay of these empirical regularities. Regression analyses on German panel data (SC6-NEPS) reveal that people rich in social capital join organizations more often (selection). Furthermore, joiners access more and higher-status social capital after joining (socializing opportunities). Low-status individuals disproportionally extend their reach towards higher positions through involvement but join less often. Compared to a counterfactual situation in which nobody joins, current involvement patterns marginally reduce some socioeconomic inequalities in access to social capital.