There is a variation in girl students' taking science classes in high school across the nation. The biggest factor is whether women join the local scientific labor force. This is in resonance with international studies.
this study examined whether 5- to 6-year-olds show a behavioral tendency to engage in social indirect reciprocity in response to their peers’ prosocial behavior toward a third party. 元論文 http://bit.ly/1rrhib8