In the social sciences experiments are harder to do as there are ethical concerns to offer with random assignments only some access to a treatment or a (supposedly) preferential treatment. Combet (ESR, 2024) conducted an experiment about school major choices in order to learn about gendered school subjects choices. The findings that female students tend to stay away from STEM subjects is reiterated. The question remains why the gender stereotypes are still as strong after the schooling in co-educative settings. The old question whether separate schooling might encourage female students to study more analytical rather than creative disciplines remains an issue. Boys tend to frighten away girls from science related subjects at an early age, maybe just due to excessive affinity to competition. The skill gaps in society later on are to the disadvantage of all. Additionally, lost innovation is the consequence. We know that international competition relies on those persons who combine the analytical as well as creative abilities to come up with new solutions. We dearly need to encourage all talents in society to persist in their occupational choices. (Image Painted ceiling Paris Opera Garnier by Chagall)