This study was prepared by Andreas Kuhlmann, while he was working with the Ifo Institute for Economic Research. It was completed in September 2006 and was accepted as a Ph.D. thesis by the Economics Department of the University of Munich. The subject of this study is the analysis of network...

Child care and education are important inputs in the human capital production function. The research of Nobel prize winner James Heckman shows that skills are built from the early childhood on and increase the returns of later educational inputs, in short: skill begets skill. Therefore, it is...