Gender differences: evidence from field tournaments

Women are under-represented in top positions, such as in business or in poli-tics. Traditional explanations, like differences in productivity and discrimination, are now complemented by psychological explanations based on lab experiments. We provide the first attempt to assess the comparative importance of psychological and traditional explanations in a natural field experiment, namely chess competitions. Controlling for discrimination and productivity, we find that women are suffering a systematic handicap when playing against men. This “psychological” effect is further amplified through the tournament structure, preventing women from reaching top positions in the chess hierarchy. The effect is only marginally smaller when we consider the most experienced individuals or the most women-friendly countries.