GTAP (Global Trade Analysis Project) is a global network of researchers and policy makers conducting quantitative analysis of international policy issues within an economy-wide framework. GTAP is coordinated by the Center for Global Trade Analysis, housed in the Department of Agricultural Economics. Our mission is to provide leadership in economic policy analysis through better data, fostering collaboration and research. The GTAP Data Base and analytical framework are used by thousands of researchers around the world. GTAP is the most widely used tool for trade policy, but its use has expanded into poverty, international migration, foreign investment, climate change, environment, energy, and biofuels policies. GTAP has become a common "language" for many of those conducting analysis of global policy issues and GTAP-based results are becoming increasingly influential in decision making around the world in trade, climate change, energy and the environment.