The basic formula was to ease repression, educate girls as well as boys, give the girls the freedom to move to the cities and take factory jobs, and then benefit from a demographic dividend as they delayed marriage and reduced childbearing. The women meanwhile financed the education of younger relatives, and saved enough of their pay to boost national savings rates. This pattern has been called “the girl effect.” In a nod to the female chromosomes, it could also be called “the double X solution.”
