Investment and all other economic actions depend on 'subjective' expectations. The problem is how to construct a theory of expectations that assumes people interpret their situations in unpredictable ways. Building on the evolutionary economics of F.A.Hayek, Koppl gives us such a theory. This includes a theory of 'Big Players', demonstrating that discretionary policy interventions create ignorance and uncertainty. The volume uses innovative methods to address many vital problems in economic theory, and connects with many other schools of economics including New Institutional Economics, Constitutional Economics and Post Walsarian Economics.

Investment and all other economic actions depend on 'subjective' expectations. The problem is how to construct a theory of expectations that assumes people interpret their situations in unpredictable ways. Building on the evolutionary economics of F.A.Hayek, Koppl gives us such a theory. This includes a theory of 'Big Players', demonstrating that discretionary policy interventions create ignorance and uncertainty. The volume uses innovative methods to address many vital problems in economic theory, and connects with many other schools of economics including New Institutional Economics, Constitutional Economics and Post Walsarian Economics.

This book develops the idea of rational expectations and surveys its use in economics today.

A fully expanded edition of the Nobel Prize–winning economist's classic book This collection of essays uses the lens of rational expectations theory to examine how governments anticipate and plan for inflation, and provides insight into the pioneering research for which Thomas Sargent was awarded the 2011 Nobel Prize in economics. Rational expectations theory is based on the simple premise that people will use all the information available to them in making economic decisions, yet applying the theory to macroeconomics and econometrics is technically demanding. Here, Sargent engages with practical problems in economics in a less formal, noneconometric way, demonstrating how rational expectations can satisfactorily interpret a range of historical and contemporary events. He focuses on periods of actual or threatened depreciation in the value of a nation's currency. Drawing on historical attempts to counter inflation, from the French Revolution and the aftermath of World War I to the economic policies of Margaret Thatcher and Ronald Reagan, Sargent finds that there is no purely monetary cure for inflation; rather, monetary and fiscal policies must be coordinated. This fully expanded edition of Rational Expectations and Inflation includes Sargent's 2011 Nobel lecture, "United States Then, Europe Now." It also features new articles on the macroeconomics of the French Revolution and government budget deficits.

Proposes a new comprehensive theory about how expectations are formed and how they shape the macro economy.

A crucial challenge for economists is figuring out how people interpret the world and form expectations that will likely influence their economic activity. Inflation, asset prices, exchange rates, investment, and consumption are just some of the economic variables that are largely explained by expectations. Here George Evans and Seppo Honkapohja bring new explanatory power to a variety of expectation formation models by focusing on the learning factor. Whereas the rational expectations paradigm offers the prevailing method to determining expectations, it assumes very theoretical knowledge on the part of economic actors. Evans and Honkapohja contribute to a growing body of research positing that households and firms learn by making forecasts using observed data, updating their forecast rules over time in response to errors. This book is the first systematic development of the new statistical learning approach. Depending on the particular economic structure, the economy may converge to a standard rational-expectations or a "rational bubble" solution, or exhibit persistent learning dynamics. The learning approach also provides tools to assess the importance of new models with expectational indeterminacy, in which expectations are an independent cause of macroeconomic fluctuations. Moreover, learning dynamics provide a theory for the evolution of expectations and selection between alternative equilibria, with implications for business cycles, asset price volatility, and policy. This book provides an authoritative treatment of this emerging field, developing the analytical techniques in detail and using them to synthesize and extend existing research.

This book deals with economic theory, not methodology. It does employ certain methodological resolutions. These resolutions and the limitations they impose on the nature and the scope of the analysis are reviewed. The first resolution concerns what kind of a theory is to be discussed. The word theory may mean many things; it may mean a hypothesis put forward as an explanation of something, an idea, or a notion. In a normative sense it may mean a recommendation, a rule, or principle to be followed. In science it usually means a system of hypotheses to be accepted as an explanation of certain facts, a set of general laws, and principles. It is also used to distinguish the general principles and methods of a subject from the practice of it.The theory with which this volume is concerned is that of science. In very general terms it may be defined as a system of hypotheses, one following from another, which permits the reader to derive from known facts and predictions of other facts. If the knowledge of the fact which we predict is important for us, in the sense that it permits us to achieve better the objectives we pursue, the theory may have a practical value. This book is therefore not only a contribution to the analysis of expectations but also an introduction to a number of selected topics in economic theory.