Bei Public Private Partnerships (PPP) spielt der Wirtschaftlichkeitsvergleich eine entscheidende Rolle. Er dient zur Ermittlung von Effizienzvorteilen und Einsparungen einer Realisierungsvariante (öffentlicher Eigenbau oder privatwirtschaftlich) und als Argumentationsgrundlage sowie...

Building on a new data set which is combined from national micro-data bases, we highlight differences in the structure of migrants to four countries, viz. France, Germany, the UK and the US, which receive a substantial share of all immigrants to the OECD world. Looking at immigrants by source...

For a long time, migration has been subject to intensive economic research. Nevertheless, empirical evidence regarding the determinants of migration still appears to be incomplete. In this paper, we analyze the effects of socio-economic and institutional determinants, especially labor-market...

This study investigates how the first childbirth affects the wage processes of highly attached women. We estimate a flexible fixed effects wage regression model extended with post-birth fixed effects by the control function approach. Register data on West Germany are used and we exploit the...

A key figure which can be applied to measuring inter-generational imbalances involved in existing public pension schemes is given by the implicit tax that is levied on each generation s life-time income through participation in these systems. The implicit tax arises from the fact that, quite...

In this paper, we investigate whether the expansion of childcare leads to an increase in the female labour supply. We measure female labour supply at both the extensive and intensive margin. For identification, we exploit a nationwide reform that expanded childcare for 1–2- year-olds in...