This document provides an overview of International Political Economy (IPE). It discusses the meaning and nature of IPE, including that IPE studies the relationships between governments, businesses, and social forces across history and geographical areas. It outlines three major theoretical perspectives on IPE: liberalism, Marxism, and mercantilism/nationalism. For each perspective, it provides details on their views of the role of the state, trade, and the economy. The document also discusses contemporary theories of IPE including hegemonic stability theory, structuralism, and the developmental state approach.