Purchasing power parity across Mexican cities: a panel data analysis

This article presents three different unit root tests for panel data, the main objective is to find the level of internal integration market through the purchasing power parity (PPP) evidence, based in the Balassa–Samuelson approach. Thus, eight kinds of markets, as tradable and nontradable goods for 16 main Mexican cities during a 21 year period have been contrasted. While two tests showed the PPP validity for seven markets, the other rejected it. The results obtained moreover feed the present controversy about which test is most appropriate to test the PPP, as soon as it is highlighted new elements emerge to explain the half-life analysis.     

Testing purchasing power parity in a multivariate cointegrating framework

This paper examines a bilateral PPP(Purchasing power parity) relationship between Australia and the 11 major trading countries by means of two alternative econometric techniques-a multivariate cointegrating framework and a band-spectral regression. It is acknowledged that there is no strong evidence that classical PPP holds in all cases. However, the generalized version of PPP holds in all cases, and provides a better explanation of the long-run relations between exchange rates and relative prices.The use of different price indices, i.e CPI and WPI,lead to different estimates and hence different policy implications.     

Revisiting purchasing power parity for major OPEC countries: evidence based on nonlinear panel unit-root tests

In this study, we apply nonlinear panel unit-root test to assess the nonstationary properties of the real exchange rate for seven major Organization of the Petroleum Exporting Countries (OPEC). We find that nonlinear panel unit-root test has higher power than linear method suggested by Breuer et al. (2001 Breuer, J. B., McNown, R. and Wallace, M. S. 2001. Misleading inferences from panel unit-root tests with an illustration from purchasing power parity. Review of International Economics, 9: 482–93. [Crossref] , [Google Scholar]) if the true data generating process of exchange rate is in fact a stationary nonlinear process. We re-examine the validity of Purchasing Power Parity (PPP) from the panel nonlinear point of view and provide robust evidence clearly indicating that PPP holds true for four countries, namely Angola, Indonesia, Iran and Saudi Arabia. Our findings point out their exchange rate adjustment is mean reversion towards PPP equilibrium values in a nonlinear way.     

Purchasing power parity and country characteristics: Evidence from panel data tests

We examine long-run purchasing power parity (PPP) using panel data methods to test for unit roots in US dollar real exchange rates of 84 countries. We find stronger evidence of PPP in countries more open to trade, closer to the United States, with lower inflation and moderate nominal exchange rate volatility, and with similar economic growth rates as the United States. We also show that PPP holds for panels of European and Latin American countries, but not for African and Asian countries. Our findings demonstrate that country characteristics can help explain both adherence to and deviations from long-run PPP.     

Threshold cointegration and purchasing power parity in the pacific nations

The paper uses a threshold cointegration methodology to explore the properties of long-run purchasing power parity (PPP) in the Pacific nations. Using Japan and the USA as base countries, it is shown that long-run PPP holds for most Asian countries but that the adjustment mechanism is asymmetric. In contrast to symmetric error-correction models, it is found that asymmetric adjustments of nominal exchange rates play an important role in eliminating deviations from long-run PPP.     

Long-run purchasing power parity revisited: a Monte Carlo simulation

The existence of long-run purchasing power parity (PPP) implies that a cointegration vector of nominal exchange rate, domestic price, and foreign price is expected regardless of using the Engle-Granger two-step method or Johansen maximum likelihood approach. However, this paper has found conflicting results: the Engle-Granger technique tends to reject the long-run PPP hypothesis whereas the Johansen method is generally supportive of long-run PPP. Via Monte Carlo simulations, the present paper finds that the Johansen approach has a bias toward supporting long-run PPP especially under the circumstances in which the assumption of normally or/and independently and identically distributed disturbance terms is violated.     

Long-run purchasing power parity and asymmetric adjustment in BRICs

The primary aim of this study is an attempt to determine whether the Purchasing Power Parity (PPP) hypothesis holds for those countries that have collectively come to be known as ‘BRICs’, namely, Brazil, Russia, India and China. We use the momentum threshold cointegration tests (advanced by Enders and Siklos, 2001 Enders, W. and Siklos, P. L. 2001. Cointegration and threshold adjustment. Journal of Business Economics and Statistics, 19: 166–76. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) to investigate whether any asymmetric adjustment is discernible for BRICs, and show that whilst the Engle–Granger test (which assumes only symmetric adjustment) fails to reveal any cointegrational relationship for BRICs, the threshold cointegration test (with asymmetric adjustment) provides clear evidence of long-run PPP for BRICs, with the notable exception of China. We conclude that asymmetric adjustment of nominal exchange rates plays an important role in eliminating deviations from long-run PPP.     

Home bias and deviations from purchasing power parity

Empirical analysis has produced mixed results in testing for PPP. This note presents a simple model linking home bias towards home-produced tradable goods with deviations from absolute PPP. We show that this bias constitutes a significant determinant of PPP deviations.     

A testing of the purchasing power parity hypothesis using a vector autoregressive model

The paper examines the hypothesis of purchasing power parity relations and the hypothesis of interest rates parity relations between the Japanese yen and the US dollar in a four-dimensional VAR (4-VAR) model, using the statistical technique developed by Johansen and Juselius (1992). The paper demonstrates that the so-called symmetry restriction on the PPP relationship holds not in a 3-VAR model but in the 4-VAR model, which indicates that a correct specification of the sampling distribution of data is important. The interest rates parity relation also holds in the 4-VAR model. The one-step prediction based on the ECM representation with such long-run relations outperforms the random walk model. These results are similar to those under the exchange rate control period (January 1974 to December 1980), which support the inclusion of this period in a whole sample period (January 1974 to December 2001).The author is very grateful to the referees and the editor of the journal for their variable and helpful comments. The first draft of the paper was presented at the autumn meeting of Japan Society of Monetary Economics in Oct 1999. The author is thankful to Eiji Ogawa for his helpful comments. The research was supported by Grant-in-Aid 13630104 of the Ministry of Education, Science and Culture of Japan and the Nomura Foundation for Social Science in 2000.First version received: March 2001/Final version received: April 2003     

Examining the evidence of purchasing power parity by recursive mean adjustment

This paper revisits the empirical evidence of purchasing power parity under the current float by recursive mean adjustment (RMA) proposed by So and Shin (1999). We first report superior power of the RMA-based unit root test in finite samples relative to the conventional augmented Dickey–Fuller (ADF) test via Monte Carlo experiments for 16 linear and nonlinear autoregressive data generating processes. We find that the more powerful RMA-based unit root test rejects the null hypothesis of a unit root for 16 out of 20 current float real exchange rates relative to the US dollar, while the ADF test rejects only 5 at the 10% significance level. We also find that the computationally simple RMA-based asymptotic confidence interval can provide useful information regarding the half-life of the real exchange rate.     

Testing the relative purchasing power parity hypothesis: the case of Korea

This study examines the relative purchasing power parity (PPP) hypothesis using the data from the Korean won–US dollar and the Korean won–Japanese yen foreign exchange markets. We extract proxies for inflation from stock market returns of Korea, the United States and Japan based on the method used by Chowdhry, Roll and Xia in 2005. We explicitly test the relative PPP hypothesis in light of the short-run price volatility using monthly, bimonthly and quarterly data from 1 January 1998 to 31 December 2012. Our findings suggest that the empirical test results from the entire sample period do not support the relative PPP hypothesis. However, the results from the sample period excluding the Asian Financial Crisis period show that the relative PPP hypothesis holds for the Korean won–US dollar market with a moderate magnitude of inflation impact, but not for the Korean won–Japanese yen market. Abrupt changes in exchange rates during the crisis period may have affected the relationship between inflation and exchange rates. This result also suggests that factors other than inflation might have affected the Korean won–Japanese yen exchange rate.     

The purchasing power parity puzzle is worse than you think

The ‘‘purchasing power parity puzzle’’ is the difficulty of reconciling very high short-term volatility of real exchange rates with very slow rates of mean reversion. The strongest evidence of slow mean reversion comes from least squares estimates of first-order autoregressive models of the long-horizon dollar-sterling real exchange rate. Using median-unbiased estimation methods, we show that these methods underestimate the half-lives of PPP deviations, and thus overestimate the speed of mean reversion. When the specification is amended to allow for serial correlation, the speed of mean reversion falls even further. This makes resolution of the purchasing power parity puzzle more problematic.First version received: May 2003/Final version received: July 2004We thank Lutz Kilian, James Lothian, Mark Taylor, and two anonymous referees for helpful comments and suggestions.     

Re-examination of the long-run purchasing power parity: further evidence from Turkey

In this article, we re-examine the empirical validity of the Purchasing Power Parity (PPP) theory for the Turkish economy. For this purpose, an empirical model is constructed using some contemporaneous estimation techniques such as multivariate co-integration and vector error correction methodology. Our estimation results reveal that the PPP can strongly be supported as a long-run stationary steady-state relationship for the Turkish economy.     

Unit roots and purchasing power parity: another kick at the can

Lopez et al. (2005 Lopez, C, Murray, C and Papell, D. 2005. State of the art unit root tests and purchasing power parity. Journal of Money, Credit and Banking, 37: 361–9. [Crossref], [Web of Science ®] , [Google Scholar]) demonstrated that single-equation unit-root tests cannot provide conclusive evidence of whether real exchange rates are stationary because inference depends critically on the lag-lengths used to construct the test statistics, a result reinforced by a recent work by Sweeney (2006 Sweeney, D. 2006. Mean reversion in nominal G-10 exchange rates. Journal of Financial and Quantitative Analysis, 41: 685–708. [Crossref], [Web of Science ®] , [Google Scholar]). The purpose of this article is to revisit the issue, first demonstrating the necessary conditions under which this approach of testing for Purchasing Power Parity (PPP) is appropriate.     

An empirical examination of long-run purchasing power parity using cointegration techniques

This paper presents an empirical analysis of long-run purchasing power parity (PPP) for five major exchange rates using recently developed econometric techniques on the cointegration of economic time series. Our empirical results are extremely unfavourable to the PPP hypothesis as a long-run equilibrium condition, even with an allowance made for measurement error and/or tranportation costs. In particular, we are unable to reject the hypothesis of non-cointegration of the exchange rate and relative prices for any of the countries concerned. Far from finding a stable, long-run proportionality between exchange rates and relative prices, our results therefore suggest that they tend to drift apart without bound.     

Buffer stocks,exchange rates and deviations from purchasing power parity

In this paper an extension of the Monetary Approach to the Exchange Rate reduced form is presented and estimated for four bilateral exchange rates with data from the recent floating experience. The extension incorporates two features: a more sophisticated modelling of money demand, using theCarr andDarby money demand specification, and allowing for deviations from purchasing power parity. The estimated results are supportive of our extended specification and we conclude by arguing that care should be taken in specifying the underlying structural relationships in asset reduced form exchange rate equations.     

A comparison of purchasing power parity and consumption levels in Austria and Czechoslovakia

An attempt is made to estimate purchasing-power parity (Par) for a comparison of Czechoslovakia's consumption level with Austria's in 1980. The Par calculation is based on modified official consumer baskets of both countries and the author's own assessment of quality and structural differences. The main conclusion is that economic development in Czechoslovakia was significantly slower than in Austria. A comparison with results of a methodologically similar study of 1964 implies a significant worsening of Czechoslovakia's relative living conditions.     

Ex ante purchasing power parity: Some evidence based on vector autoregressions in the time domain

Theex ante purchasing power parity (EPPP) hypothesis maintains that the expected rate of nominal exchange rate depreciation should be equal to the expected inflation differential over the relevant period. By modelling the inflation differential and the rate of depreciation as a jointly determined process, this paper derives a test of EPPP by examining the vector autoregressive representation. We also make allowance for the possibility of conditional heteroscedasticity in the inflation and exchange rate innovations. Our empirical results tend to support the EPPP hypothesis.Any views expressed are those of the author and are not necessarily those of the Bank of England. I am grateful to two anonymous referees and an editor for comments on a previous version of this paper; the usual disclaimer applies.