Oversized restaurant portions might not be responsible for the obesity epidemic, researchers found. People who live within five miles of a restaurant eat out twice as often as those who live farther away and also eat more, but they typically compensate for bigger restaurant meals by eating less the rest of the day, according to David Matsa of the Kellogg School of Management and Michael Anderson of the University of California, Berkeley. Their findings undermine a key assumption driving public policy decisions on taxing and limiting certain types of eateries.

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