In related work with @adameczanna.bsky.social we show that boy twins also overestimate their math ability as compared to their girl twin and their parents and teachers do the same
link.springer.com/article/10.1...
link.springer.com
Peers, parents, and self-perceptions: the gender gap in mathematics self-assessment - Journal of Population Economics
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 the gender gap in self-assessed mathematics ...