The effect of two characteristics of school populations on reading skills will be estimated in this paper: share and diversity, both on the ethnic and the social-cultural dimension. We use the cross-national PISA-data 2006, both for the 15 years old native pupils and the pupils with a migrant...

We study the causal relation between private wealth and retirement age. We propose two estimation strategies based on expected retirement age. The outcome variable is observed repeatedly over time. We correct first for the unobserved heterogeneity in the disutility of work by using panel data...