We use aggregate PISA data for 19 countries over the period 2000–2009 to study whether a higher share of immigrant pupils affects the school performance of natives. We find evidence of a negative and statistically significant relationship. The size of the estimated effect is small: doubling...

We model individual careers in sports and games from initial entry to eventual exit or success as a discrete - choice, finite - horizon optimization problem. We apply this model to the international game of chess and study cross - country differences in the relative success of players. While we...