This course examines the macroeconomic growth of the United States over the past 125 years, with an emphasis on the economic theories and analytical methods used to study long-run development. It is organized around major thematic topics rather than chronology, with each topic covered over two lectures and focused on the key economic phenomena that have shaped the U.S. economy. Topics include the measurement of economic growth; the roles of institutions, geography, and technology in shaping productivity; migration and local labor markets; schooling and human capital accumulation; the spatial distribution of industry; market failures and financial crises; role of government in economic growth; and income and wealth inequality. Students will engage with a range of empirical research methods and theoretical frameworks used in modern economic analysis. Familiarity with introductory economics and econometrics is strongly encouraged. Students are expected to attend all classes, actively participate in discussions, and complete two in-class exams in addition to problem sets. Course open only to juniors and seniors.  This is not a writing intensive course.