This course is an introduction to the theory and empirical evidence of long-run economic growth, capital accumulation (investment) and their determinants. It focuses on the analysis of the practical and public policy implications of modern theories of growth for different sustainable balanced growth paths across nations and over time spans of 50 to 100 years. The course answers two questions: why do some countries grow faster and over longer periods than others? What are the determinants of varying long-run economic growth rates and what can public policies do to affect these rates?