It's definitely a case of specialisation, but your explanation doesn't address the correlation between the ancient methods of agriculture and current day labour

It's definitely a case of specialisation, but your explanation doesn't address the correlation between the ancient methods of agriculture and current day labour force participation that the study does: But in countries like Rwanda, Botswana, Madagascar or Kenya, whose people are predominantly descended from hoe-users, women are far more likely to be in the labour force than those in historically plough-using places like India, Syria or Egypt.