Convergence of Adaptive Learning and the Concept of Expectational Stability in Linear Rational Expectations Models with Multiple Equilibria PDF Download

Author: Maik Heinemann
Publisher:
ISBN:
Category :
Languages : en
Pages : 36

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Author: George W. Evans
Publisher: Princeton University Press
ISBN: 1400824265
Category : Business & Economics
Languages : en
Pages : 440

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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.

Author: Michael Woodford
Publisher: Elsevier
ISBN: 9780444501561
Category :
Languages : en
Pages : 822

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Author: William A. Branch
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Regime-switching rational expectations models, in which the parameters of the model evolve according to a finite state Markov process, have properties that differentiate them from linear models. Issues that are well understood in linear contexts, such as equilibrium determinacy and stability under adaptive learning, re-emerge in this new context. This paper outlines these issues and defines two classes of equilibria that emerge from regime-switching models. The distinguishing feature between the two classes is whether the conditional density of the endogenous state variables depends on past regimes. An assumption on whether agents condition their expectations on past regimes has important implications for determinacy and equilibrium dynamics. The paper addresses the stability properties of the different classes of equilibria under adaptive learning, extending the learning literature to a non-linear framework.

Author: Roger Guesnerie
Publisher: MIT Press
ISBN: 9780262262903
Category : Business & Economics
Languages : en
Pages : 498

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A theoretical assessment of the Rational Expectations Hypothesis through subjecting a collection of economic models to an "eductive stability" test. The rational expectations hypothesis (REH) dominates economic modeling in areas ranging from monetary theory, macroeconomics, and general equilibrium to finance. In this book, Roger Guesnerie continues the critical analysis of the REH begun in his Assessing Rational Expectations: Sunspot Multiplicity and Economic Fluctuations, which dealt with the questions raised by multiplicity and its implications for a theory of endogenous fluctuations. This second volume emphasizes "eductive" learning: relying on careful reasoning, agents must deduce what other agents guess, a process that differs from the standard evolutionary learning experience in which agents make decisions about the future based on past experiences. A broad "eductive" stability test is proposed that includes common knowledge and results in a unique "rationalizable expectations equilibrium." This test provides the basis for Guesnerie's theoretical assessment of the plausibility of the REH's expectational coordination, emphasizing, for different categories of economic models, conditions for the REH's success or failure. Guesnerie begins by presenting the concepts and methods of the eductive stability analysis in selected partial equilibrium models. He then explores to what extent general equilibrium strategic complementarities interfere with partial equilibrium considerations in the formation of stable expectations. Guesnerie next examines two issues relating to eductive stability in financial market models, speculation and asymmetric price information. The dynamic settings of an infinite horizon model are then taken up, and particular standard and generalized saddle-path solutions are scrutinized. Guesnerie concludes with a review of general questions and some "cautious" remarks on the policy implications of his analysis.

Author: George W. Evans
Publisher:
ISBN: 9789514554452
Category : Applied mathematics
Languages : en
Pages : 71

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Author: Bert G. Hickman
Publisher: World Scientific
ISBN: 9789810232344
Category : Business & Economics
Languages : en
Pages : 372

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This book covers two years of research activities associated with Project LINK, which is based on a model of the world economy, covering 79 countries or regional groupings of countries. Papers dealing with interesting thematic issues were carefully selected and expanded into full articles. The subjects studied by various LINK participants for reporting at annual meetings include exchange rate systems, international investment, environmental protection, international economic institutions, LINK system improvements, and international economic policy. As always, there are contributions dealing with methodological advances for world modeling.

Author: Martin Lettau
Publisher:
ISBN:
Category : Equilibrium (Economics)
Languages : en
Pages : 44

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Author: J. Barkley Rosser
Publisher: Springer Science & Business Media
ISBN: 9401716137
Category : Business & Economics
Languages : en
Pages : 313

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From Catastrophe to Chaos: A General Theory of Economic Discontinuities presents and unusual perspective on economics and economic analysis. Current economic theory largely depends upon assuming that the world is fundamentally continuous. However, an increasing amount of economic research has been done using approaches that allow for discontinuities such as catastrophe theory, chaos theory, synergetics, and fractal geometry. The spread of such approaches across a variety of disciplines of thought has constituted a virtual intellectual revolution in recent years. This book reviews the applications of these approaches in various subdisciplines of economics and draws upon past economic thinkers to develop an integrated view of economics as a whole from the perspective of inherent discontinuity.

Author:
Publisher:
ISBN:
Category : Economic development
Languages : en
Pages : 1158

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