Many commentators have claimed that farm subsidies have contributed significantly to the “obesity epidemic” by making fattening foods relatively cheap and abundant. But U.S. farm policies have generally small and mixed effects on farm commodity prices.
View full article here: Farm Subsidies and Obesity in the United States: National Evidence and International Comparisons. By Julian M. Alston, Daniel A. Sumner, Stephen A. Vosti. :470-47. (December 2008)