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"Aggregation Bias" DOES Explain the PPP Puzzle

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Author Info
Jean Imbs
Haroon Mumtaz
Morten O. Ravn
Hélène Rey

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Abstract

This article summarizes our views on the role of an "aggregation bias" in explaining the PPP Puzzle, in response to the several papers recently written in reaction to our initial contribution. We discuss in particular the criticisms of Imbs, Mumtaz, Ravn and Rey (2002) presented in Chen and Engel (2005). We show that their contentions are based on: (i) analytical counter-examples which are not empirically relevant; (ii) simulation results minimizing the extent of "aggregation bias"; (iii) unfounded claims on the impact of measurement errors on our results; and (iv) problematic implementation of small-sample bias corrections. We conclude, as in our original paper, that "aggregation bias" goes a long way towards explaining the PPP puzzle.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 11607.

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Date of creation: Sep 2005
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Handle: RePEc:nbr:nberwo:11607

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Find related papers by JEL classification:
C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data
F31 - International Economics - - International Finance - - - Foreign Exchange
F15 - International Economics - - Trade - - - Economic Integration

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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. 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. [Downloadable!] (restricted)
  2. 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. [Downloadable!] (restricted)
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  3. 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. [Downloadable!]
    Other versions:
  4. Peter C. B. Phillips & Donggyu Sul, 2003. "Dynamic panel estimation and homogeneity testing under cross section dependence *," Econometrics Journal, Royal Economic Society, vol. 6(1), pages 217-259, 06. [Downloadable!] (restricted)
  5. Carlos Carvalho, 2005. "Heterogeneity in Price Setting and the Real Effects of Monetary Shocks," Macroeconomics 0509017, EconWPA, revised 12 Sep 2005. [Downloadable!]
  6. Boyd, Derick & Smith, Ron, 1999. "Testing for Purchasing Power Parity: Econometric Issues and an Application to Developing Countries," Manchester School, University of Manchester, vol. 67(3), pages 287-303, June. [Downloadable!] (restricted)
  7. Pesaran, H.M., 2003. "Estimation and Inference in Large Heterogeneous Panels with Cross Section Dependence," Cambridge Working Papers in Economics 0305, Faculty of Economics, University of Cambridge. [Downloadable!]
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  8. Frankel, Jeffrey A. & Rose, Andrew K., 1996. "A panel project on purchasing power parity: Mean reversion within and between countries," Journal of International Economics, Elsevier, vol. 40(1-2), pages 209-224, February. [Downloadable!] (restricted)
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  9. Dr. Peter Kenning & Hilke Plassmann, 2004. "NeuroEconomics," Experimental 0412005, EconWPA. [Downloadable!]
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Giorgio Fazio & Peter McAdam & Ronald MacDonald, 2007. "Disaggregate Real Exchange Rate Behaviour," Open Economies Review, Springer, vol. 18(4), pages 389-404, September. [Downloadable!] (restricted)
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  2. Christian Broda & David E. Weinstein, 2008. "Understanding International Price Differences Using Barcode Data," NBER Working Papers 14017, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  3. Berka, Martin, 2006. "Non-linear adjustment in law of one price deviations and physical characteristics of goods," MPRA Paper 8606, University Library of Munich, Germany, revised Dec 2007. [Downloadable!]
    Other versions:
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