When women's bargaining power increases, the benefits to them, and to society, can be huge. Apart from being a desirable end in itself, female empowerment leads to lower birth rates and child mortality, better education for children, higher female participation in the labor market and politics (and, with it, better representation of women's concerns), and the alleviation of poverty, especially in developing countries.

Moreover, raising women's cultural and economic status can help tackle the problem of what another Nobel Prize winning economist Amartya Sen once called "missing women". These are the women who would have been alive were it not for sex-selective abortions and gender discrimination in the provision of nutrition and medical attention.

Today, assumptions about gender (such as innate differences in abilities) have become intellectually untenable, while rigorous statistical analyses have identified the prime causes of gender differences in economic outcomes. But an important, and perhaps less explored, factor that determines women's autonomy and economic well-being is non-economic.

For example, in a recent study, Alberto Alesina, Paola Giuliano and Nathan Nunn examined levels of female participation in the US labor market among first- and second-generation immigrants from regions that historically used the plow in agriculture. The plow is significant, because operating it requires upper-body strength, which limits women's suitability for farm work. The authors found that even today, women originating from regions that historically used the plow were less likely to be employed than women whose forebears did not.

The finding suggests that in plow-using societies, patriarchal values circumscribed female mobility, and allowed men - as a result of their greater economic contribution - to undermine women's autonomy. Remarkably, these values, shaped many centuries ago, when certain physical attributes might have been important, have survived in modern societies, in which such attributes have become largely irrelevant.

Indeed, given that most jobs in developed economies require little or no physical strength, cultural values that discourage women from working outside home are rightly regarded as archaic, serving only to undermine women's economic and political freedoms. The research therefore appears to support the postmodern feminist view that women are constrained by unexamined socially constructed notions.

But despite Simone de Beauvoir's claim in The Second Sex that "one is not born, but rather becomes, a woman" being true, biology and evolutionary psychology are still relevant. Myriad human interactions produce institutions, norms, organizations and practices that perpetuate a sexual hierarchy of well-being. Though the study of economics and gender has been transformed in recent years, the profound impact of culture demonstrates that we still have much to learn.

The author is a professor of economics at the Vancouver School of Economics, University of British Columbia, Canada. His latest book is Why Gender Matters in Economics.

Project Syndicate