Women and the world economy | A guide to womenomics | Economist.com:

?WHY can’t a woman be more like a man?? mused Henry Higgins in ?My Fair Lady?. Future generations might ask why a man can’t be more like a woman. In rich countries, girls now do better at school than boys, more women are getting university degrees than men are and females are filling most new jobs. Arguably, women are now the most powerful engine of global growth.
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In particular, there is strong evidence that educating girls boosts prosperity. It is probably the single best investment that can be made in the developing world. Not only are better educated women more productive, but they raise healthier, better educated children. There is huge potential to raise income per head in developing countries, where fewer girls go to school than boys. More than two-thirds of the world’s illiterate adults are women.