A Reexamination of Purchasing Power Parity: A Multicountry and Multiperiod Study
AbstractThis paper presents a systematic analysis of the purchasing power parity hypothesis (PPP). This hypothesis states that the exchange rate is equal to the ratio of the domestic price level to the foreign price level. It has recently been argued that PPP performs poorly in the 1970s. This paper examines several possible explanations for this poor performance . We examine PPF in the 1920s and the 1970s, using monthly and quarterly data, to see if the relationship has changed over time. We also examine PPP in a multi-exchange rate world, allowing a quite general error process so as to allow deviations from PPP to be autocorrelated and correlated across currencies. We are then able to examine the degree to which the world has become more interdependent. We also provide evidence that deviations from PPP may follow a random walk. Finally, the role of the U.S. dollar as base currency is examined. We find, in general, that PPP holds quite well as a long run proposition, but the deviations from PPP tend to persist.
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Bibliographic InfoPaper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 0865.
Date of creation: Mar 1982
Date of revision:
Publication status: published as Hakkio, Craig S. "A Re-Examination Of Purchasing Power Parity: A Multi-country And Multi-Period Study," Journal of International Economics, 1984, v17(3/4), 265-278.
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