This course examines theory and policy analysis at both microeconomic and macroeconomic levels. We will be concerned with establishing the conditions under which the market generates efficient solutions, and those conditions in which it presumably does not. In those cases where the market may not perform well, we will be interested in analyzing the impact of possible government policies on the outcome. We are also interested in how the whole economy works. In this case, we discuss economic growth, economic fluctuation, inflation and unemployment.