This paper examines the economic effects of employment protection legislation in a sample of developed and developing countries. By implementing a difference-in-differences test, we lessen the potentially severe endogeneity and omitted variable problems associated with cross-country regressions....

This study seeks to explain country differences in the performance at the International Mathematical Olympiad. Hypotheses on the relationship between, on one hand, performance at the Olympiads and, on the other, population size and dynamics, economic resources, human capital, schooling quantity...