Chapter three of the document discusses the theoretical perspectives of international political economy (IPE), defining its meaning and significance before exploring various national political economy systems, such as liberalism, mercantilism, and marxism. It highlights the evolving nature of IPE, including the impact of globalization, the governance systems of international trade, and the roles of institutions like the WTO and the World Bank. The chapter emphasizes the complexities of market-state relationships and the importance of understanding the core issues in global political economy.