We exploit rules of class formation to identify the causal effect of increasing the number of immigrants in a classroom on natives test scores, keeping class size constant (Pure Composition Effect). We explain why this is a relevant policy parameter although it has been neglected so far. We show...

This paper offers a model of the interaction between composition of jobs and labour market regulation. Ex-post rent-sharing due to search frictions implies that ‘good’ jobs which have higher creation costs must pay higher wages. This wage differential distorts the composition of jobs, and in...

In May 1991, 15,000 Ethiopian Jews were brought to Israel in an overnight airlift and sorted in a haphazard and essentially random fashion to absorption centres across the country. This quasi-random assignment produced a natural experiment whereby the initial schooling environment of Ethiopian...

This paper offers and tests a theory of training whereby workers do not pay for general training they receive. The crucial ingredient in our model is that the current employer has superior information about the worker’s ability relative to other firms. This informational advantage gives the...

Several recent studies based on 'exogenous' sources of variation in education outcomes show Instrumental Variables (IV) estimates of returns to schooling that are substantially higher than the corresponding Ordinary Least Squares (OLS) estimates. Card (1995a) suggests that these results can be...

An important component of the long-run cost of a war is the loss of human capital, suffered by children of schooling age who receive less education because of the war. This paper shows that in the European countries involved in World War II, children who were ten years old during the conflict...

In Israel, as in many other countries, a high school matriculation certificate is required by universities and some jobs. In spite of the certificate’s value, Israeli society is marked by vast differences in matriculation rates by region and socioeconomic status. We attempted to increase the...

There is renewed interest in ways to enhance secondary education, especially among disadvantaged students. This study evaluates the short-term effects of a remedial education programme that provided additional instruction to under-performing high school students in Israel. The programme targeted...

This paper documents the existence of striking regional differences in the reported behaviour of employees working within the same firm, but in different Italian regions. In particular, the frequency of recorded and punished misconduct episodes is significantly higher among employees working in...

Performance-related pay for teachers is being introduced in many countries, but there is little evaluation to date on the effects of such programmes. This Paper evaluates a particular incentive experiment. The incentive program is a rank-order tournament among teachers of English, Hebrew, and...