Does "Aggregation Bias" Explain the PPP Puzzle?
AbstractRecently, Imbs et. al. (2002) have claimed that much of the purchasing power parity puzzle can be explained by aggregation bias'. This paper re-examines aggregation bias. First, it clarifies the meaning of aggregation bias and its applicability to the PPP puzzle. Second, the size of the bias' is shown to be much smaller than the simulations in Imbs et. al. (2002) suggest, if we rule out explosive roots in the simulations. Third, we show that the presence of non-persistent measurement error especially in the Imbs et. al. (2002) data can make price series appear less persistent than they really are. Finally, it is now standard to recognize that small-sample bias plagues estimates of speeds of convergence of PPP. After correcting small sample bias by methods proposed by Kilian (1998) and by So and Shin (1999), the half-life estimates indicate that heterogeneity and aggregation bias do not help to solve the PPP puzzle.
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Date of creation: Feb 2004
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- F31 - International Economics - - International Finance - - - Foreign Exchange
- C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models &bull Diffusion Processes
This paper has been announced in the following NEP Reports:
- NEP-ALL-2004-02-15 (All new papers)
- NEP-ETS-2004-02-15 (Econometric Time Series)
- NEP-IFN-2004-02-15 (International Finance)
- NEP-RMG-2004-02-15 (Risk Management)
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- Mario J. Crucini & Mototsugu Shintani, 2002.
"Persistence in Law-Of-One-Price Deviations: Evidence from Micro-Data,"
Vanderbilt University Department of Economics Working Papers
0222, Vanderbilt University Department of Economics, revised Jul 2004.
- Crucini, Mario J. & Shintani, Mototsugu, 2008. "Persistence in law of one price deviations: Evidence from micro-data," Journal of Monetary Economics, Elsevier, vol. 55(3), pages 629-644, April.
- Mario J. Crucini & Mototsugu Shintani, 2006. "Persistence in Law-of-One-Price Deviations: Evidence from Micro-data," Levine's Bibliography 321307000000000311, UCLA Department of Economics.
- Mario J. Crucini & Mototsugu Shintani, 2006. "Persistence in Law-Of-One-Price Deviations: Evidence from Micro-Data," Vanderbilt University Department of Economics Working Papers 0616, Vanderbilt University Department of Economics.
- Charles Engel, 1999.
"Local-Currency Pricing and the Choice of Exchange-Rate Regime,"
Discussion Papers in Economics at the University of Washington
0036, Department of Economics at the University of Washington.
- Engel, Charles, 2000. "Local-currency pricing and the choice of exchange-rate regime," European Economic Review, Elsevier, vol. 44(8), pages 1449-1472, August.
- Charles Engel, 1999. "Local-Currency Pricing and the Choice of Exchange-Rate Regime," Working Papers 0036, University of Washington, Department of Economics.
- Haroon Mumtaz & Jean Imbs & Morten O. Ravn & Helene Rey, 2003.
"PPP Strikes Back: Aggregation and the Real Exchange Rate,"
IMF Working Papers
03/68, International Monetary Fund.
- Jean Imbs & Haroon Mumtaz & Morten Ravn & Hélène Rey, 2005. "PPP Strikes Back: Aggregation and the Real Exchange Rate," The Quarterly Journal of Economics, MIT Press, vol. 120(1), pages 1-43, January.
- Jean Imbs & Haroon Mumtaz & Morten O. Ravn & Helene Rey, 2003. "PPP Strikes Back: Aggregation and the Real Exchange Rate," IEHAS Discussion Papers 0307, Institute of Economics, Centre for Economic and Regional Studies, Hungarian Academy of Sciences.
- Jean Imbs & Haroon Mumtaz & Morton O. Ravn & Helene Rey, 2002. "PPP Strikes Back: Aggregation and the Real Exchange Rate," NBER Working Papers 9372, National Bureau of Economic Research, Inc.
- Imbs, Jean & Mumtaz, Haroon & Ravn, Morten O. & Rey, Hélène, 2003. "PPP Strikes Back: Aggregation and the Real Exchange Rate," CEPR Discussion Papers 3715, C.E.P.R. Discussion Papers.
- Andrews, Donald W K & Chen, Hong-Yuan, 1994. "Approximately Median-Unbiased Estimation of Autoregressive Models," Journal of Business & Economic Statistics, American Statistical Association, vol. 12(2), pages 187-204, April.
- Paul Cashin & C. John McDermott, 2003.
"An Unbiased Appraisal of Purchasing Power Parity,"
IMF Staff Papers,
Palgrave Macmillan, vol. 50(3), pages 1.
- Murray, Christian J. & Papell, David H., 2002.
"The purchasing power parity persistence paradigm,"
Journal of International Economics,
Elsevier, vol. 56(1), pages 1-19, January.
- Christian J. Murray & David H. Papell, 2000. "The Purchasing Power Parity Persistence Paradigm," Econometric Society World Congress 2000 Contributed Papers 0017, Econometric Society.
- Granger, C. W. J., 1980. "Long memory relationships and the aggregation of dynamic models," Journal of Econometrics, Elsevier, vol. 14(2), pages 227-238, October.
- Andrews, Donald W K, 1993. "Exactly Median-Unbiased Estimation of First Order Autoregressive/Unit Root Models," Econometrica, Econometric Society, vol. 61(1), pages 139-65, January.
- So, Beong Soo & Shin, Dong Wan, 1999. "Recursive mean adjustment in time-series inferences," Statistics & Probability Letters, Elsevier, vol. 43(1), pages 65-73, May.
- Christian Murray & David Papell, 2005. "The purchasing power parity puzzle is worse than you think," Empirical Economics, Springer, vol. 30(3), pages 783-790, October.
- Lutz Kilian, 1998. "Small-Sample Confidence Intervals For Impulse Response Functions," The Review of Economics and Statistics, MIT Press, vol. 80(2), pages 218-230, May.
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