The first chapter studies individual behavior in contests when individuals have preferences for status or relative standing. More specifically, it investigates whether the psychological closeness between contestants influences effort decisions in a contest for a prize. It does so by extending...

It is well established that boys perceive themselves to be better in mathematics than girls, even when their ability is the same. We examine the drivers of this male overconfidence in self-assessed mathematics ability using a longitudinal study of twins. This allows us to control for family...

We extend the analysis of early-emerging gender differences in academic achievement to include both (objective) test scores and (subjective) teacher assessments. Using data from the 1998-99 ECLS-K cohort, we show that the grades awarded by teachers are not aligned with test scores, with the...