Harvard tend to begin the course with a weaker math background than men, math background does not explain much of the gender … also do not explain much of the gender gap. On the other hand, women do less well in economics relative to other courses … than men do, and controlling for this difference in relative performance significantly diminishes the estimated gender gap …

This paper provides new evidence on gender bias in teaching evaluations. We exploit a quasi-experimental dataset of 19 …. Despite the fact that neither students' grades nor self-study hours are affected by the instructor's gender, we find that …' evaluations, is larger for mathematical courses and particularly pronounced for junior women. The gender bias in teaching …