We present evidence that the practice of holding back poorly performing students affects estimates of the impact of class size on student outcomes based on within-school variation of cohort size over time. This type of variation is commonly used to identify class size effects. We build a...

This paper presents the results of a randomized study of a home visiting program implemented in Germany for low-income, first-time mothers. A major goal of the program is to improve the participants’ economic self-sufficiency and family planning. I use administrative data from the German...

This paper presents results from a randomized evaluation of a home visiting program for disadvantaged first-time mothers and their families implemented in three German federal states. I analysis the impact of the intervention on maternal employment, school attendance, child care use, fertility,...

There is conceptually a big difference between inequality of opportunity and inequality of outcomes, and the policies needed to address the two different kinds of inequality are also very different. However, it is difficult to measure inequality of opportunity. This paper proposes a new measure...