Does the gender composition of a classroom affect how much both girls and boys learn? A new paper by economists Victor Lavy and Analia Schlosser says yes. Here's what they find:
* Both boys' and girls' academic achievement improves when classrooms include a higher proportion of girls.
* A higher proportion of female peers lowers the level of classroom disruption and violence, improves inter-student and student-teacher relationships as well as students' overall satisfaction in school, and lessens teachers' fatigue.