Macroeconomics is a study of the economy as a whole, including the description and measurement of macroeconomic variables such as gross domestic product, prices and inflation, employment and unemployment, aggregate consumption, investment, government spending and taxes, money supply and demand, interest rates, trade deficit / surplus, balance of payments and exchange rates ... Simple economic models will help us explain the relationships between these variables. On that basis, we will study the short-run economic fluctuations, the problems of the economic cycle, supply and demand-side shocks, and the role of stabilization policies such as fiscal policy and monetary policy.