We live in an era of globalization: ever increasing international integration of goods, capital, and labor markets. The benefits and costs of increased trade and financial integration in the world today continue to be hotly debated. The reason globalization is controversial is that the impact of globalization is often nuanced, and theory reveals many possibilities. The impact of globalization on macroeconomic outcomes thus remains an empirical and quantitative question.Levchenko collects, in one volume, the results of a multi-year research program to build heterogeneous firm and sector models for the quantitative evaluation of globalization. The volume explores the impact of globalization on both welfare and macroeconomic fluctuations using these micro-founded quantitative models.Recent advances in international trade have built tractable theoretical models that can be implemented numerically and used to evaluate quantitatively the impact of a variety of phenomena. These models are global in scale