A currently high-ranking question on the political agenda of many developed countries relates to the intensive margin of child care and thus to the effects of prolonging the opening hours of child care institutions. This study adds to the scarce literature on this question and investigates the...

Many countries are currently expanding access to child care for young children. But are all children equally likely to benefit from such expansions? We address this question by adopting a marginal treatment effects framework. We study the West German setting where high quality center-based care...