Did Gender Inequality Start With the Plow?

"From a pair of Harvard economists, Alberto Alesina and Nathan Nunn, and a UCLA business school professor, Paola Giuliano, comes this working paper (Abstract here and below; full version here) that tests the hypothesis that current gender role differences can be traced to shifting methods of agriculture, particularly the introduction of the plow, which required significant upper body strength, grip 
strength, and burst of power that favored men over women."


From the Freakonomics Blog  http://www.freakonomics.com/blog/