Disagreement and Biases in Inflation Expectations

Disagreement in inflation expectations observed from survey data varies systematically over time in a way that reflects the level and variance of current inflation. This paper offers a simple explanation for these facts based on asymmetries in the forecasters’ costs of over- and under-predicting inflation. Our model implies (i) biased forecasts; (ii) positive serial correlation in forecast errors; (iii) a cross-sectional dispersion that rises with the level and the variance of the inflation rate; and (iv) predictability of forecast errors at different horizons by means of the spread between the short- and long-term variance of inflation. We find empirically that these patterns are present in inflation forecasts from the Survey of Professional Forecasters. A constant bias component, not explained by asymmetric loss and rational expectations, is required to explain the shift in the sign of the bias observed for a substantial portion of forecasters around 1982.

[1]  T. Willett,et al.  A Note on the Relation between the Rate and Variability of Inflation , 1976 .

[2]  Stephen G. Cecchetti,et al.  Asset Pricing with Distorted Beliefs: Are Equity Returns Too Good to Be True? , 1998 .

[3]  Stephen G. Cecchetti,et al.  Inflation and Uncertainty at Long and Short Horizons , 1990 .

[4]  Victor Zarnowitz,et al.  Twenty-Two Years of the Nber-Asa Quarterly Economic Outlook Surveys: Aspects and Comparisons of Forecasting Performance , 1992 .

[5]  J. Carlson,et al.  Sources of dispersion in consumer inflation forecasts , 2003 .

[6]  H. Berument,et al.  Inflation and inflation uncertainty in the G-7 countries , 2005 .

[7]  J. Stock,et al.  The NAIRU, Unemployment and Monetary Policy , 1997 .

[8]  P. Wachtel,et al.  Differential Inflationary Expectations and the Variability of the Rate of Inflation: Theory and Evidence , 1979 .

[9]  G. Evans,et al.  Learning and expectations in macroeconomics , 2001 .

[10]  C. Hommes.  Heterogeneous Agent Models in Economics and Finance , 2005 .

[11]  Andrew J. Patton,et al.  Testing Forecast Optimality Under Unknown Loss , 2007 .

[12]  Takatoshi Ito.  Foreign Exchange Rate Expectations: Micro Survey Data , 1988 .

[13]  Arnold Zellner,et al.  Biased predictors, rationality and the evaluation of forecasts , 1986 .

[14]  T. Bollerslev,et al.  Generalized autoregressive conditional heteroskedasticity , 1986 .

[15]  J. Galí,et al.  The Science of Monetary Policy: A New Keynesian Perspective , 1999 .

[16]  C. Capistrán.  Bias in Federal Reserve Inflation Forecasts: Is the Federal Reserve Irrational or Just Cautious? , 2005 .

[17]  F. Diebold,et al.  Further results on forecasting and model selection under asymmetric loss , 1996 .

[18]  Nicholas M. Kiefer,et al.  HETEROSKEDASTICITY-AUTOCORRELATION ROBUST STANDARD ERRORS USING THE BARTLETT KERNEL WITHOUT TRUNCATION , 2002 .

[19]  D. Croushore,et al.  Evaluating inflation forecasts , 1998 .

[20]  C. Hommes.  Heterogeneous Agent Models in Economics and Finance, In: Handbook of Computational Economics II: Agent-Based Computational Economics, edited by Leigh Tesfatsion and Ken Judd, Elsevier, Amsterdam 2006, pp.1109-1186 , 2005 .

[21]  W. Branch.  Sticky information and model uncertainty in survey data on inflation expectations , 2007 .

[22]  J. Keynes,et al.  The General Theory of Employment, Interest and Money. , 1936 .

[23]  J. Wolfers,et al.  Disagreement about Inflation Expectations , 2003, NBER Macroeconomics Annual.

[24]  F. Diebold,et al.  Optimal Prediction Under Asymmetric Loss , 1994, Econometric Theory.

[25]  P. Sørensen,et al.  The Strategy of Professional Forecasting , 2001 .

[26]  E. Weber.  From Subjective Probabilities to Decision Weights: The Effect of Asymmetric Loss Functions on the Evaluation of Uncertain Outcomes and Events , 1994 .

[27]  T. Stark,et al.  A Funny Thing Happened on the Way to the Data Bank: A Real-Time Data Set for Macroeconomists , 2000 .

[28]  Robert M. Townsend,et al.  Forecasting the Forecasts of Others , 1983, Journal of Political Economy.

[29]  L. Robert.  Some International Evidence on Output-Inflation Tradeoffs. , 1973 .

[30]  Andrew J. Patton,et al.  Properties of Optimal Forecasts under Asymmetric Loss and Nonlinearity , 2007 .

[31]  Tilman Ehrbeck,et al.  Why Are Professional Forecasters Biased? Agency versus Behavioral Explanations , 1996 .

[32]  Nicholas S. Souleles.  Expectations, Heterogeneous Forecast Errors, and Consumption: Micro Evidence from the Michigan Consumer Sentiment Surveys , 2004 .

[33]  N. Mankiw,et al.  Sticky Information Versus Sticky Prices: A Proposal to Replace the New Keynesian Phillips Curve , 2001 .

[34]  Stephen Taylor,et al.  Forecasting Economic Time Series , 1979 .

[35]  Expected Stock Returns and Variance Risk Premia , 2007 .

[36]  David Laster,et al.  Rational Bias in Macroeconomic Forecasts , 1997 .

[37]  Joseph S. Tracy,et al.  Modeling Uncertainty: Predictive Accuracy as a Proxy for Predictive Confidence , 2003 .

[38]  Gordon Leitch,et al.  Economic Forecast Evaluation: Profits versus the Conventional Error Measures , 1991 .

[39]  Stephen Gordon,et al.  A Preference Regime Model of Bull and Bear Markets , 2000 .

[40]  Dean Croushore,et al.  Introducing: The Survey of Professional Forecasters , 1993 .

[41]  Christopher D. Carroll,et al.  Macroeconomic Expectations of Households and Professional Forecasters , 2003 .

[42]  M. Pesaran,et al.  Survey Expectations , 2005, SSRN Electronic Journal.

[43]  Allan Timmermann,et al.  Estimation and Testing of Forecast Rationality under Flexible Loss , 2005 .

[44]  Allan Timmermann,et al.  How Learning in Financial Markets Generates Excess Volatility and Predictability in Stock Prices , 1993 .

[45]  R. Fisher.  The Advanced Theory of Statistics , 1943, Nature.

[46]  William A. Brock,et al.  A rational route to randomness , 1997 .

[47]  M. Birnbaum,et al.  Source Credibility in Social Judgment : Bias , Expertise , and the Judge ' s Point of View , 1979 .

[48]  E. Weber,et al.  Reasons for Rank-Dependent Utility Evaluation , 1997 .

[49]  Allan Timmermann,et al.  Biases in Macroeconomic Forecasts: Irrationality or Asymmetric Loss? , 2008 .