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'Aggregation Bias' DOES Explain the PPP Puzzle

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  • Imbs, Jean
  • Mumtaz, Haroon
  • Ravn, Morten O
  • Rey, Hélène

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.

Suggested Citation

  • Imbs, Jean & Mumtaz, Haroon & Ravn, Morten O & Rey, Hélène, 2005. "'Aggregation Bias' DOES Explain the PPP Puzzle," CEPR Discussion Papers 5237, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:5237
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    References listed on IDEAS

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    1. 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.
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    4. Jean Imbs & Haroon Mumtaz & Morten O. Ravn & Hélène Rey, 2005. "PPP Strikes Back: Aggregation And the Real Exchange Rate," The Quarterly Journal of Economics, Oxford University Press, vol. 120(1), pages 1-43.
    5. Shiu-Sheng Chen & Charles Engel, 2005. "Does 'Aggregation Bias' Explain The Ppp Puzzle?," Pacific Economic Review, Wiley Blackwell, vol. 10(1), pages 49-72, February.
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    Cited by:

    1. C. Thubin & T. Ferrière & E. Monnet & M. Marx & V. Oung, 2016. "The PRISME model: can disaggregation on the production side help to forecast GDP?," Working papers 596, Banque de France.
    2. Joseph Byrne & Norbert Fiess, 2010. "Euro area inflation: aggregation bias and convergence," Review of World Economics (Weltwirtschaftliches Archiv), Springer;Institut für Weltwirtschaft (Kiel Institute for the World Economy), vol. 146(2), pages 339-357, June.
    3. Martin Berka, 2009. "Nonlinear Adjustment in Law of One Price Deviations and Physical Characteristics of Goods," Review of International Economics, Wiley Blackwell, vol. 17(1), pages 51-73, February.
    4. M. Dolores Gadea & Laura Mayoral, 2009. "Aggregation is not the solution: the PPP puzzle strikes back," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 24(6), pages 875-894.
    5. Carlos Carvalho & Fernanda Nechio, 2011. "Aggregation and the PPP Puzzle in a Sticky-Price Model," American Economic Review, American Economic Association, vol. 101(6), pages 2391-2424, October.
    6. Mayoral, Laura & Dolores Gadea, María, 2011. "Aggregate real exchange rate persistence through the lens of sectoral data," Journal of Monetary Economics, Elsevier, vol. 58(3), pages 290-304.
    7. Ariel Burstein & Gita Gopinath, 2013. "International Prices and Exchange Rates," NBER Working Papers 18829, National Bureau of Economic Research, Inc.
    8. Christian Broda & David E. Weinstein, 2008. "Understanding International Price Differences Using Barcode Data," NBER Working Papers 14017, National Bureau of Economic Research, Inc.
    9. Giorgio Fazio & Peter McAdam & Ronald MacDonald, 2007. "Disaggregate Real Exchange Rate Behaviour," Open Economies Review, Springer, vol. 18(4), pages 389-404, September.
    10. Christian J. Murray & Hatice Ozer-Balli & David H. Papell, 2006. "PPP Persistence within Sectoral Real Exchange Rate Panels," Papers of the Annual IUE-SUNY Cortland Conference in Economics,in: Proceedings of the Conference on Human and Economic Resources, pages 388-398 Izmir University of Economics.

    More about this item

    Keywords

    goods market integration; heterogenous dynamics; relative prices;

    JEL classification:

    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • F15 - International Economics - - Trade - - - Economic Integration
    • F31 - International Economics - - International Finance - - - Foreign Exchange

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