This is a doctoral level course in macroeconomics. Macroeconomics is the study of the national economy as a whole. In that regard, we examine the behavior of aggregate variables, such as output (GDP), the price level, money supply, aggregate private and government spending, taxation, debt, and growth rates. We study the interactions among them, and their relationships with other variables. The course will be primarily concerned in analysis of Keynesian and classical models with comparative statics, permanent and transitory shocks, new classical macroeconomic issues including signal extraction, policy ineffectiveness, observational equivalence, and Lucas’s critique, overlapping generations’ models and multiple equilibria and finally growth t...