Impact of the WTO on agricultural and food policies

Most studies on the impact of WTO agreements on policies are ex ante simulations or focus on trade effects. We ex post estimate the impact of the WTO on agricultural policies, including both the total transfers by the policies and the policy instruments used, in particular their market distortions. We use OECD data on total support and instrument choice in agricultural policy. Our empirical analysis provides evidence that the WTO did not cause a significant reduction in the total amount of support to agriculture but that it caused a significant shift from distortionary to less distortionary instruments.