Christian Dustmann, Hyejin Ku, Do Won Kwak, 28 September 2017

Some studies have shown that pupils from single-sex schools outperform their counterparts at mixed-gender schools. This column attempts to disentangle the causal effects by exploiting a government policy in South Korea that led to some single-sex schools converting to co-ed one grade at a time. Academic performance fell for boys when their schools became co-ed even if their class remained single-sex, but performance only fell among girls whose classes became mixed. These results suggest different mechanisms for the effects of mixed-gender schools on boys’ and girls’ academic performance.

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