We use data and estimates on biofuel impacts reported in the literature to assess some of the controversy surrounding the introduction of biofuels by conducting meta-analyses on the impacts of corn ethanol on food and fuel prices, greenhouse gases, employment, rural income, balance of trade, the United States government budget, and learning-by-doing. The meta-analyses suggest that corn ethanol has had a relatively significant impact on the income of agricultural and related agribusiness industries, employment in farm states, fuel security in terms of reducing the import of oil from abroad, and the overall balance of trade. These effects are likely the main drivers behind biofuel policies.