1. Refereed Journal // 2009

    Why Do Firms Train Apprentices? The Net Cost Puzzle Reconsidered

    Almost all papers on the motivation of German firms to train apprentices take as a stylised fact that training firms have to incur net costs. This notion stems practically from one source only - a series of…

  2. Refereed Journal // 2009

    Peer effects in European primary schools: Evidence from PIRLS

    We estimate peer effects for fourth graders in six European countries. The identification relies on variation across classes within schools, which we argue are formed roughly randomly. The estimates are much…

  3. Refereed Journal // 2009

    Technological Change and Uncertainty in Environmental Economics

    Introduction to Special Issue with the same title, based on ZEW conference in 2006