This document provides an overview of international political economy (IPE) and discusses several national political economy systems. It defines IPE as the relationship between governments, businesses, and social forces across borders and over time. IPE has both a political dimension concerning power and decision making, as well as an economic dimension regarding resource distribution. The document then examines theoretical perspectives on IPE including mercantilism, liberalism, and Marxism. It also analyzes prominent national systems including the market-oriented capitalism of the US, developmental capitalism of Japan, and social market capitalism of Germany.