Macroeconomics is the application of economic theory to the study of the economy's growth, cycle and price-level determination. Macroeconomics takes account of stylized facts observed in the real world and builds theoretical frameworks to explain such facts. Economic growth is a stylized fact of market economies, since England's nineteenth-century industrial revolution. Until then, poverty was a common good for humanity. Economic growth consists in the persistent, smooth and sustained increase of per-capita income. A market economy shows periods of expanding and contracting economic activity. This phenomenon is the economic cycle. The price of money is the amount of goods bought with one unit of money, in other words, the inverse of the price level. Determination of the price level, or the value of money, is a fascinating subject in a fiat money economy.

This book presents a theoretical framework to explain chronic inflation and hyperinflation. The roots of these two phenomenon are a fiscal monetary regime in which money issues finance the public deficit. Chronic inflation is modeled by using both the old and the new Keynesian model, with a different policy rule. Instead of using the Taylor rule, the central bank policy rule states that money is issued to finance the public deficit. The chronic inflation models take into account the fact that indexation mechanisms adjust prices and wages, yielding the inertial component of inflation. The dynamics of these models can be very unstable under parameter changes or shocks that hit the economy. The previous hyperinflation models surveyed in this book attempt to explain hyperinflation as a bubble phenomenon because they assume a constant real deficit financed by money. The mechanics of hyperinflation models in this book explains hyperinflation by a fiscal crisis, characterized by an increasing fiscal deficit. This fiscal crisis yields an intertemporal budget constraint that is not sustainable. The analysis of the pathology of hyperinflation uses the same tools employed to understand the pathologies of public debt and external debt crises. The hyperinflation model allows a taxonomy of hyperinflations, namely bubble, weak and strong, that can be tested with the inflation tax revenue curve.

Macroeconomics is the application of economic theory to the study of the economy's growth, cycle and price-level determination. Macroeconomics takes account of stylized facts observed in the real world and builds theoretical frameworks to explain such facts. Economic growth is a stylized fact of market economies, since England's nineteenth-century industrial revolution. Until then, poverty was a common good for humanity. Economic growth consists in the persistent, smooth and sustained increase of per-capita income. A market economy shows periods of expanding and contracting economic activity. This phenomenon is the economic cycle. The price of money is the amount of goods bought with one unit of money, in other words, the inverse of the price level. Determination of the price level, or the value of money, is a fascinating subject in a fiat money economy.

This workbook presents the answers to the exercises in Macroeconomic Theory, Fluctuations, Inflation and Growth in Closed and Open Economies by Fernando de Holanda Barbosa (2018). Altogether, there are 172 exercises in eleven chapters and three appendices. The organization of this workbook follows the organization of the main text. The first part deals with flexible price models, including the representative agent model, the overlapping generations model, and the Solow growth model. The second part covers sticky price models; both Keynesian and Neoclassical. The third part presents exercises on the government budget constraint and monetary theory issues. There are two types of exercises in this workbook. The first type provides the student with material to practice for a full understanding the subjects presented in the text. The second type covers topics that are not dealt with in the main text, but are included for the sake of completeness. These exercises are marked with an asterisk and can be solved using the tools presented in the corresponding textbook chapter or appendix.