“ We have estimated the effect of the introduction of the potato on Old World population growth and urbanization. The nutritional and caloric superiority of the potato, and its diffusion from the New World to the Old, allows us to estimate causal effects using a difference-in-differences estimation strategy. According to our most conservative estimates, the introduction of the potato explains 22% of the observed post-1700 increase in population growth. These results show that food and nutrition matter. By increasing the nutritional carrying capacity of land they can have large effects on population.”
Source: heyitsnoah
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