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Potential Pitfalls for the Purchasing-Power-Parity Puzzle? Sampling and Specification Biases in Mean-Reversion Tests of the Law of One Price

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  • Alan M. Taylor

Abstract

The PPP puzzle is based on empirical evidence that international price differences for individual goods (LOOP) or baskets of goods (PPP) appear highly persistent or even non-stationary. The present consensus is these price differences have a half-life that is of the order of five years at best, and infinity at worst. This seems unreasonable in a world where transportation and transaction costs appear so low as to encourage arbitrage and the convergence of price gaps over much shorter horizons, typically days or weeks. However, current empirics rely on a particular choice of methodology, involving (i) relatively low-frequency monthly, quarterly, or annual data, and (ii) a linear model specification. In fact, these methodological choices are not innocent, and they can be shown to bias analysis to-wards findings of slow convergence and a random walk. Intuitively, if we suspect that the actual adjustment horizon is of the order of days then monthly and annual data cannot be expected to reveal it. If we suspect arbitrage costs are high enough to produce a substantial band of inaction' then a linear model will fail to support convergence if the process spends considerable time random-walking in that band. Thus, when testing for PPP or LOOP, model specification and data sampling should not proceed without consideration of the actual institutional context and logistical framework of markets.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 7577.

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Date of creation: Mar 2000
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Publication status: published as Taylor, Alan M. "Potential Pitfalls For The Purchasing-Power-Parity Puzzle? Sampling And Specification Biases In Mean-Reversion Tests Of The Law Of None Price," Econometrica, 2001, v69(2,Mar), 473-498.
Handle: RePEc:nbr:nberwo:7577

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  1. Ng, Serena, 1995. "Testing for unit roots in flow data sampled at different frequencies," Economics Letters, Elsevier, vol. 47(3-4), pages 237-242, March.
  2. Engel, C., 1996. "Long-Run PPP May Not Hold After All," Discussion Papers in Economics at the University of Washington 96-05, Department of Economics at the University of Washington.
  3. Ramey, Valerie A, 1989. "Inventories as Factors of Production and Economic Fluctuations," American Economic Review, American Economic Association, vol. 79(3), pages 338-54, June.
  4. Nathan S. Balke & Thomas B. Fomby, 1992. "Threshold cointegration," Research Paper 9209, Federal Reserve Bank of Dallas.
    • Balke, Nathan S & Fomby, Thomas B, 1997. "Threshold Cointegration," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 38(3), pages 627-45, August.
  5. Dumas, Bernard, 1992. "Dynamic Equilibrium and the Real Exchange Rate in a Spatially Separated World," Review of Financial Studies, Society for Financial Studies, vol. 5(2), pages 153-80.
  6. Campbell, John Y. & Mankiw, N. Gregory, 1990. "Permanent Income, Current Income, and Consumption," Scholarly Articles 3353762, Harvard University Department of Economics.
  7. Berloffa, Gabriella, 1997. "Temporary and Permanent Changes in Consumption Growth," Economic Journal, Royal Economic Society, vol. 107(441), pages 345-58, March.
  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.
  9. Canzoneri, Matthew B & Cumby, Robert & Diba, Behzad, 1996. "Relative Labour Productivity and the Real Exchange Rate in the Long Run: Evidence for a Panel of OECD Countries," CEPR Discussion Papers 1464, C.E.P.R. Discussion Papers.
  10. Sarno, Lucio & Taylor, Mark P., 1998. "Real Interest Rates, Liquidity Constraints and Financial Deregulation: Private Consumption Behavior in the U.K," Journal of Macroeconomics, Elsevier, vol. 20(2), pages 221-242, April.
  11. Lothian, James R., 1997. "Multi-country evidence on the behavior of purchasing power parity under the current float," Journal of International Money and Finance, Elsevier, vol. 16(1), pages 19-35, February.
  12. Kenneth Rogoff, 1996. "The Purchasing Power Parity Puzzle," Journal of Economic Literature, American Economic Association, vol. 34(2), pages 647-668, June.
  13. Ermini, Luigi, 1993. "Effects of Transitory Consumption and Temporal Aggregation on the Permanent Income Hypothesis," The Review of Economics and Statistics, MIT Press, vol. 75(4), pages 736-40, November.
  14. Michael, Panos & Nobay, A Robert & Peel, David A, 1997. "Transactions Costs and Nonlinear Adjustment in Real Exchange Rates: An Empirical Investigation," Journal of Political Economy, University of Chicago Press, vol. 105(4), pages 862-79, August.
  15. Philippe BACCHETTA & Stefan GERLACH, 1997. "Consumption and Credit Constraints : International Evidence," Cahiers de Recherches Economiques du Département d'Econométrie et d'Economie politique (DEEP) 9707, Université de Lausanne, Faculté des HEC, DEEP.
  16. Baillie, R.T. & Bollerslev, T., 1989. "Intra Day And Inter Market Volatility In Foreign Exchange Rates," Papers 8811, Michigan State - Econometrics and Economic Theory.
  17. Schwert, G. William, 1987. "Effects of model specification on tests for unit roots in macroeconomic data," Journal of Monetary Economics, Elsevier, vol. 20(1), pages 73-103, July.
  18. Glen, Jack D., 1992. "Real exchange rates in the short, medium, and long run," Journal of International Economics, Elsevier, vol. 33(1-2), pages 147-166, August.
  19. Mark P. Taylor, 1995. "The Economics of Exchange Rates," Journal of Economic Literature, American Economic Association, vol. 33(1), pages 13-47, March.
  20. Blundell-Wignall, Adrian & Browne, Frank & Tarditi, Alison, 1995. "Financial Liberalization and the Permanent Income Hypothesis," The Manchester School of Economic & Social Studies, University of Manchester, vol. 63(2), pages 125-44, June.
  21. Froot, Kenneth A. & Rogoff, Kenneth, 1995. "Perspectives on PPP and long-run real exchange rates," Handbook of International Economics, in: G. M. Grossman & K. Rogoff (ed.), Handbook of International Economics, edition 1, volume 3, chapter 32, pages 1647-1688 Elsevier.
  22. Jorion, Philippe & Sweeney, Richard J., 1996. "Mean reversion in real exchange rates: evidence and implications for forecasting," Journal of International Money and Finance, Elsevier, vol. 15(4), pages 535-550, August.
  23. O'Connell, Paul G. J., 1998. "The overvaluation of purchasing power parity," Journal of International Economics, Elsevier, vol. 44(1), pages 1-19, February.
  24. Bayoumi, Tamim A, 1993. "Financial Deregulation and Consumption in the United Kingdom," The Review of Economics and Statistics, MIT Press, vol. 75(3), pages 536-39, August.
  25. Courtland L. Washburn & Clark S. Binkley, 1990. "On the Use of Period-Average Stumpage Prices to Estimate Forest Asset Pricing Models," Land Economics, University of Wisconsin Press, vol. 66(4), pages 379-393.
  26. Taylor, Mark P & Peel, David A & Sarno, Lucio, 2001. "Nonlinear Mean-Reversion in Real Exchange Rates: Toward a Solution to the Purchasing Power Parity Puzzles," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 42(4), pages 1015-42, November.
  27. Menzie Chinn & Louis Johnston, 1996. "Real Exchange Rate Levels, Productivity and Demand Shocks: Evidence from a Panel of 14 Countries," NBER Working Papers 5709, National Bureau of Economic Research, Inc.
  28. Shiller, Robert J. & Perron, Pierre, 1985. "Testing the random walk hypothesis : Power versus frequency of observation," Economics Letters, Elsevier, vol. 18(4), pages 381-386.
  29. Lawrence J. Christiano & Martin Eichenbaum & David Marshall, 1990. "The permanent income hypothesis revisited," Staff Report 129, Federal Reserve Bank of Minneapolis.
  30. Cochrane, John H, 1988. "How Big Is the Random Walk in GNP?," Journal of Political Economy, University of Chicago Press, vol. 96(5), pages 893-920, October.
  31. Poterba, James M. & Summers, Lawrence H., 1988. "Mean reversion in stock prices : Evidence and Implications," Journal of Financial Economics, Elsevier, vol. 22(1), pages 27-59, October.
  32. Alan M. Taylor, 1996. "International Capital Mobility in History: Purchasing-Power Parity in the Long Run," NBER Working Papers 5742, National Bureau of Economic Research, Inc.
  33. Hall, Robert E, 1988. "Intertemporal Substitution in Consumption," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 339-57, April.
  34. Papell, David H., 1997. "Searching for stationarity: Purchasing power parity under the current float," Journal of International Economics, Elsevier, vol. 43(3-4), pages 313-332, November.
  35. Robert E. Hall, 1987. "Consumption," NBER Working Papers 2265, National Bureau of Economic Research, Inc.
  36. Maurice Obstfeld & Alan M. Taylor, 1997. "Nonlinear Aspects of Goods-Market Arbitrage and Adjustment: Heckscher's Commodity Points Revisited," NBER Working Papers 6053, National Bureau of Economic Research, Inc.
  37. Sercu, Piet & Uppal, Raman & Van Hulle, Cynthia, 1995. " The Exchange Rate in the Presence of Transaction Costs: Implications for Tests of Purchasing Power Parity," Journal of Finance, American Finance Association, vol. 50(4), pages 1309-19, September.
  38. Lothian, James R & Taylor, Mark P, 1996. "Real Exchange Rate Behavior: The Recent Float from the Perspective of the Past Two Centuries," Journal of Political Economy, University of Chicago Press, vol. 104(3), pages 488-509, June.
  39. Oh, Keun-Yeob, 1996. "Purchasing power parity and unit root tests using panel data," Journal of International Money and Finance, Elsevier, vol. 15(3), pages 405-418, June.
  40. Apte, Prakash & Kane, Marian & Sercu, Piet, 1994. "Relative PPP in the medium run," Journal of International Money and Finance, Elsevier, vol. 13(5), pages 602-622, October.
  41. Lothian, James R. & Taylor, Mark P., 1997. "Real exchange rate behavior," Journal of International Money and Finance, Elsevier, vol. 16(6), pages 945-954, December.
  42. Francisco Maeso-Fernandez, 1998. "Econometric methods and purchasing power parity: short- and long-run PPP," Applied Economics, Taylor & Francis Journals, vol. 30(11), pages 1443-1457.
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