The dissertation is comprised of three essays entitled: Food before Biodiesel Fuel; Drought, Ethanol, and Livestock; and U.S. Ethanol and World Hunger: Is there a Connection? The aim of the dissertation is to assess the impact of U.S. bioenergy industry on domestic and world market through different dimensions. The first two essays are to link vertically the biofuel, food, and livestock market, the third paper is to link horizontally U.S. corn market and world market.