On the Origins of Gender Roles: Women and the Plough. Alberto Alesina, Nathan Nunn, May 2013, Paper. “The study examines the historical origins of existing cross-cultural differences in beliefs and values regarding the appropriate role of women in society. We test the hypothesis that traditional agricultural practices influenced the historical gender division of labor and the evolution of gender norms. We find that, consistent with existing hypotheses, the descendants of societies that traditionally practiced plough agriculture today have less equal gender norms, measured using…” Link Verified October 18, 2014