On Forecasting Heterogeneity, Irrational Exuberance, and the Multiplicity of Rational Expectations Equilibria

Received February 20, 2001; revised version received July 23, 2001     

Expectations and learning under alternative monetary regimes: an experimental approach

Summary We design and analyze experimental versions of monetary overlapping generations economies under alternative policy regimes. Economies with a constant level of real deficit financed through seignorage, economies in which the level of deficit is adapted in order to follow a monetary policy with a target rate of inflation, and economies with preannounced changes in deficit levels are reported here. We also examine the behavior of an economy with no stationary competitive equilibrium. Our time series are compared to rational expectations equilibrium paths and to adaptive learning dynamics.Financial support for our work from the Graduate School of the University of Minnesota, the National Science Foundation (SES-8912552), Richard M. and Margaret Cyert Family Funds, and the Ministry of Education of Spain is gratefully acknowledged. We wish to thank Javier Diaz-Giménez, Jean Michael Grandmont, Robert Lucas, Albert Marcet, Charles Plott, Edward Prescott, Thomas Sargent, Neil Wallace and Michael Woodford for commenting on our work. We also thank Vijay Rajan for developing the software for the computerized experimental environment, and Jackie Cuccaro and Dhananjay Gode for their research assistance.     

Monetary Policy,Expectations and Commitment*

Commitment in monetary policy leads to equilibria that are superior to those from optimal discretionary policies. A number of interest‐rate reaction functions and instrument rules have been proposed to implement or approximate commitment policy. We assess these rules in terms of whether they lead to a rational expectations equilibrium that is both locally determinate and stable under adaptive learning by private agents. A reaction function that appropriately depends explicitly on private sector expectations performs particularly well on both counts.     

Expectations and the Dynamic Feedback between Foreign Direct Investment and Economic Growth

This paper seeks to analyze the dynamic feedback between Foreign Direct Investment (FDI) and economic growth – larger FDI promotes higher GDP, while higher GDP can be achieved with higher levels of FDI. We use panels and a sample of 19 Latin American countries to estimate a dynamic FDI and a dynamic GDP equation that jointly characterize the evolution of both variables. We find that the dynamics of GDP and FDI are mostly driven by the expectations. Shocks of GDP or FDI were found to play no role affecting the dynamics.     

Learning to believe in nonrational expectations that support pareto-superior outcomes

I consider the prototype New Keynesian macroeconomic model with subjective demand expectations of firms. In this model the firms' objective demand is log-linear in their relative price. Firms believe that their demand curve is linear or log-linear in their absolute price. They estimate the parameters of this curve by least squares from past observations on prices and quantities. The wage rate either clears the labor market given firms' demand perceptions or is given in the short run and changes according to a linear Phillips curve. In either setup of the model the interplay between learning and price setting confirms the subjective model. Among the long-run equilibria are solutions at which the representative household attains a higher level of utility as compared to the rational-expectations outcome. If the supply of labor depends upon the real wage, money is not neutral.     

一般均衡中的利率、确定性与最优规则

利率规则理论是以短期利率作为货币政策工具而发展起来的一套新的理论,它体现了货币经济学家在货币政策领域内的新的尝试和努力。在利率规则理论中,货币经济学家试图解决两个问题:利率规则冲击对非政策经济变量的短期影响是什么,以及一个好的利率规则应当具有怎样的性质。利率规则将短期利率作为非政策经济变量的内生反应函数,使得货币经济学家可以在一般均衡模型中探讨这两个问题。然而,由于利率规则从一开始就是出于一种偏好的设定,因此,讨论的结果并不符合稳健性和科学性的要求,这就削弱了理论预言的可靠性。在某种意义上,利率规则理论若想成为一门真正的"科学的艺术",它就必须为内生利率规则寻找到一个坚固的微观基础。本文梳理评述了利率规则理论在经验上和理论上的成就和不足。     

Are Rational Expectations Equilibria with Private Information Eductively Stable?

The paper derives conditions for eductive stability of rational expectations equilibria in simple linear economic models with private information. Following Guesnerie (1992; 2002), the concept of eductive stability is used. It is shown that even in a private information setting, rational expectations equilibria might be justified as a result of mental process of reasoning of the agents. The paper considers an equilibrium concept, where the agents are unable to condition their forecasts on the actual market price. It is shown that eductive stability in this case requires that a condition is satisfied that is also relevant in the symmetric information case. This condition is compared to the respective stability condition that must hold if agents are able to use the current market price as an additional source of information. It turns out that the conditions for eductive stability that emerge under both equilibrium concepts differ.revised version received September 11, 2003     

Altruism and Determinacy of Equilibria in Overlapping Generations Models with Externalities

This paper deals with an OLG model with production and a single commodity, in which agents are assumed altruistic and the aggregate production function contains external effects. I prove that, if the technology satisfies a minor assumption, which encompasses positive and negative externalities, some curvature conditions on the utility function ensure local determinacy of stationary and period 2 equilibria. I prove that non-separable, strictly concave preferences are a fundamental ingredient for the occurrence of indeterminate equilibria. Finally, considering the case of unbounded growth, I establish that for any utility and production functions a unique balanced growth path is globally determinate.
JEL Classification Numbers: C62, E32     

Subjective Inheritance Expectations and Economic Outcomes

In this paper we investigate whether and to what extent inheritance expectations act as a driver of economic choices. We use survey data that are representative of the Dutch adult population with a specific module on subjective probabilities on receiving an inheritance and its amount in the next 10 years. We analyze whether the expected inheritance acts as a deterrent to saving. Results suggest that individuals perceive the expected inheritances as a potential increase of personal wealth, which leads to a reduction in savings. Expectations also appear to matter for the intentions to bequeath and for intended choices on work versus leisure in the future.     

The Role of Absolute Continuity in “Merging of Opinions” and “Rational Learning”

D. Blackwell and L. Dubins (1962, Ann. Math. Statist.38, 882–886) showed that opinions merge when priors are absolutely continuous. E. Kalai and E. Lehrer (1993, Econometrica61, 1019–1045) use this result to show that players in a repeated game eventually play like a Nash equilibrium. We provide an alternative proof of merging of opinions that clarifies the role of absolute continuity while casting doubt on the relevance of the result. Persistent disagreement, the opposite of merging, allows the construction of a sequence of mutually favorable “bets.” By a law of large numbers, both agents are certain they will win these bets on average. This certain disagreement violates absolute continuity. Journal of Economic Literature Classification Numbers: C11, C69, C72, D83.     

理性预期和适应性预期股价模型的比较研究

本文首先介绍了理性预期股价模型和适应性预期股价模型 ,并对两种模型的定价方法和实证分析结果进行了比较 ,得出了较理性预期模型而言 ,适应性预期模型对于成熟股票市场有更强的解释能力 ,结论对我国股市有一定借鉴意义。     

Rational expectations and fixed-event forecasts: An application to UK inflation

This paper tests a version of the rational expectations hypothesis using ‘fixed-event’ inflation forecasts for the UK. Fixed-event forecasts consist of a panel of forecasts for a set of outturns of a series at varying horizons prior to each outturn. The forecasts are the prediction of fund managers surveyed by Merrill Lynch. Fixed-event forecasts allow tests for whether expectations are unbiased in a similar fashion to the rest of the literature. But they also permit the conduct of particular tests of forecast efficiency - whether the forecasts make best use of available information - that are not possible with rolling-event data. We find evidence of a positive bias in inflation expectations. Evidence for inefficiency is much less clear cut.First version received: June 2002/ Final version received: November 2003We would like two anonymous referees and an editor for comments that have significantly improved the paper. The views expressed in this paper are those of the authors and do not necessarily reflect those of the Bank of England.     

Retirement Expectations and Satisfaction with Retirement Provisions

This paper investigates the relationship between subjective expectations regarding the replacement rate of income at retirement and several measures of pension satisfaction. We use panel data on Dutch employees, analyzed with fixed effects models, allowing for correlation between unobserved heterogeneity in satisfaction and optimism or pessimism in expectations. The level of the expected replacement rate is found to be positively related to satisfaction: respondents who revise their expectations of the level of their replacement rate upwards tend to become more satisfied with their pension provisions, in particular with the level of the expected benefits. We do not find robust evidence for a relationship between uncertainty and pension satisfaction.     

Rationalizable expectations and sunspot equilibria in an overlapping-generations economy

There are two theories for the treatment of market uncertainty: rationalizable expectations and sunspot equilibria. This paper shows how the game-theoretic solution concept of rationalizable expectations can be applied to an overlapping-generations exchange economy. Some general properties of these equilibria are discussed. It is shown that rationalizable-expectations equilibria are the predictions yielded by considering sunspot equilibria in which probability beliefs may differ across individuals. This result allows for a new interpretation of sunspot equilibria and helps to understand their relevance.     

Inflation Expectations and Monetary Policy Surprises*

We estimate monetary policy surprises for European consumers over time, based on monetary policy changes that were unanticipated according to consumers’ stated beliefs. We find that such monetary policy surprises have the opposite impact on inflation expectations from the impact found when assuming that consumers are well informed. Relaxing the latter assumption by focusing on consumers’ stated beliefs, unanticipated increases in the interest rate raise inflation expectations before the 2008 financial crisis. This is consistent with imperfect information theoretical settings where interest rate hikes are interpreted as positive news about the state of the economy by consumers who know that policymakers have relatively more information.     

Monetary Disequilibrium, Endogenous Money, Stability and the Determinacy of Inflation

This paper examines the stability of the disequilibrium money model, with endogenous money and transitory interest rate control by the Central Bank. In the tradition of the post-Keynesian literature, the money supply is determined by bank lending and disequilibrium between money demand and supply determines the business cycle. The rate of interest is assumed to react to an inflation target and inflation responds to the business cycle. The paper examines the stability of the model under three inflation response systems: the accelerationist model, adaptive expectations and rational expectations.
(J.E.L.: E3, E4, E5).     

The Rational Development of Logistics in China

Logistics has become more and more popular in recent years in China. There are five reasons that can explain the phenomenon. It is a problem that logistics development neglects the trade or commerce. The trade flow guides the logistics. So the logistics should develop calmly. If not, it might cause the problem of irrational and aimless resources allocation.     

Evolutionary Economics,Rational Expectations,and Monetary Policy

Wealth disparity is a critical factor in the perpetuation of blackwhite disparity in the United States. Intergenerational wealth transfers are the major determinant of household wealth formation. A program of reparations would acknowledge past and continued injustice, redress such injustices, and provide closure. Radical institutional analysis benefits this policy discussion in at least three areas: explaining the re-creation of discrimination; indicating the role of wealth disparity; and identifying the funding source for reparations. For centuries the economic surplus has enhanced white wealth relative to black wealth. A program of reparations suggests directing the surplus toward funding black-white equality.     

Rational underdevelopment: regional economic disparities under the Heckscher-Ohlin Theorem

This paper analyzes how differences in regional development arise through technological variations and changes. Previous Ricardian-model-based considerations of this phenomenon, known as rational underdevelopment, have ignored migration, elasticities, multidimensional factors and inputs. This study thus re-examines rational underdevelopment in light of the Heckscher-Ohlin Theorem, considering two regions, with two sectors, in two periods. The regions have different factor and technology endowments. The first region has a technology sector, and the second is a technology laggard. Once a new technology that can potentially benefit both regions is introduced, the technology-endowed region offers financial transfers to the technologically lagging region. This equalizes regional incomes but also reduces the possibility that the laggard will adopt the new technology and decrease its developmental disadvantage. We also discuss the influence of mobile factors, which reduce regional inequality. The results show that rational underdevelopment extends beyond wage subsidies to mobile factors and capital. The analysis has implications for economic policies aimed at reducing inter-regional inequality.     

精英教育的守望与理性回归

分析了精英教育和大众教育的关系,阐述了在高等教育大众化时代精英教育的重要性,认为办好精英教育需要政府的大力支持,精英教育必须保持高度的选择性,以尽力维持精英型大学的水准,要建立一种能有效促使高等教育系统功能分化的制度。