During a summer internship in 2005, Andrew Youn found himself standing in the middle of a dirt road in Bungoma, a district in western Kenya. On one side of the road, the business school student met a family who had grown an impressive two tons of maize on an acre of their land, enough to feed all of their children for a year and have some left over. But Youn met a family living just across the road who hadn’t eaten that day. They had managed to harvest only a half-ton of maize from the sam…

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