The PEIO conference brings together economists, political scientists and other scholars to address political-economy issues related to any international organization, including the World Trade Organization, the United Nations, the International Monetary Fund, the World Bank, the European Union, and also other international organizations that have as yet received less attention in the academic literature. Questions we seek to address include how IOs are organized and governed, what are the incentives of governments dealing with IOs as well as the incentives of the bureaucrats who staff them, and what are the effects of IOs on policy outcomes. We will also consider the interaction of IOs with transnational actors such as commercial lobbies and NGOs. Finally, we have a particular interest in the interaction of the international political economy with the domestic political economy of IO members.