The decision to take more education is complex, and is influenced by individual ability, financial constraints, family background, preferences, etc. Such factors, normally unobserved by the researcher, introduce endogeneity and heterogeneity problems into estimating the returns to education. In...

In this paper we try to explain the academic performance of a sample of children starting their first year at public schools in 1999 in Montevideo, Uruguay. We are mainly interested in the effect of pre-school education on the children’s academic results. We found fairly strong empirical...