This article uses the mass migration wave to Israel in the 1990s to examine the impact of immigrant concentration during elementary school on the long-term academic outcomes of native students in high school. The results suggest that the overall presence of immigrants in a grade had an adverse...

This paper offers an explanation for some evidence that intergenerational earnings mobility is higher in more developed economies and that mobility is positively correlated with wage equality. In the model mobility promotes economic growth via its effect on the accumulation and allocation of...

This paper develops a theory of fertility that offers an explanation for the persistence of poverty within and across countries. If educated individuals have a comparative advantage in raising educated children then parental fertility choice is shown to give rise to a poverty trap, in which the...

The twentieth century saw dramatic international shifts in scientific leadership. Despite these dramatic shifts Britain's position has been remarkably stable and strong. I study these changes using data on Nobel laureates in Chemistry, Medicine, and Physics. Raw data show a slight decline in...