Purchasing Power Parity and the Law of One Price: Evidence from Commodity Prices in Asian Countries
Mohsen Bahmani-Oskooee () and
Nasir Abm ()
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Nasir Abm: School of Business, North Carolina Central University, Durham, NC 27707, USA
Global Economy Journal, 2015, vol. 15, issue 2, 231-240
Almost all previous studies that have tested the law of one price or Purchasing Power Parity theory (PPP) have used either real effective exchange rates or bilateral real exchange rates which are constructed using CPI or PPI data. Most of these studies have failed to support the PPP mostly due to aggregation bias. A few recent studies, have, therefore used commodity prices in different countries and have provided strong support for the theory. These studies have mostly used data from industrial countries. In this paper, we use individual prices of 52 retail items from 15 cities in Asia and test for stationarity of the real exchange rate and speed of adjustment. We provide support for PPP in 63% of the cases. We also find that using individual prices lead to faster convergence of real rates toward their PPP values.
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