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Sex, Equality, and Growth

We set up a model of economic and demographic long-run development, where inequality in income and reproductive success (polygynous mating) plays a central role. The model generates a slow and gradual compression of the income gap between landholders and landless, together with rising levels of human capital. This process spurts at some stage, as society endogenously transits into sustained growth. Simultaneously, inequality in income and reproductive success drops; society becomes monogamous.