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Satınalma gücü paritesi, döviz kuru belirleme teorileri arasında en eski ve en tartışmalı yaklaşımlardan biridir. Bu çalışma, satınalma gücü paritesinin uzun dönemli geçerliliğini 36 OECD ülkesi için Fourier kantil birim kök testi ile incelenmeyi amaçlamaktadır. Analizler 1993:1-2018:8 aylık dönemleri kapsamaktadır. Fourier kantil birim kök testi sonuçları, 24 OECD ülkesi için satınalma gücü paritesinin geçerli olduğunu ortaya koymaktadır. Bu durum, söz konusu 24 OECD ülkesinde yer alan döviz kurlarının nispi fiyat değişikliklerine uyum sağladığını ve satınalma gücü paritesi teorisinin bu ülkeler için güvenilir bir döviz kuru belirleme aracı olarak kullanılabileceğini ifade etmektedir.

We test the PPP hypothesis in 29 African countries using a newly developed nonlinear Quantile unit root test with a Fourier function which accounts for smooth breaks. Simulation indicates that the proposed new test has higher power than the conventional Quantile unit root test as proposed by Koneker and Xiao (2004). Our empirical results provide support for the PPP hypothesis in 21 out of 29 African countries, a unique discovery using their real effective exchange rates. It appears that incorporating Fourier function to nonlinear Quantile unit root test gets us closer and closer to solving the PPP puzzle in Africa. [ABSTRACT FROM AUTHOR]

This study analyses the long-run validity of the purchasing power parity (PPP) between Turkey and its major trading partners (China, Euro Area, Russia, United Kingdom, and United States) by using the Fourier quantile unit root test. Fourier quantile unit root test results show that PPP is valid for all countries. Additionally, the Fourier quantile unit root test presents more evidence in favour of the PPP hypothesis in comparison to conventional and other Fourier-type unit root tests. [ABSTRACT FROM AUTHOR]

Abstract: This paper examines the legitimacy of the Purchasing Power Parity condition applied to the quantile process for 12 oil‐exporting countries: Algeria, Angola, Canada, Colombia, Indonesia, Iran, Kazakhstan, Kuwait, Mexico, Nigeria, Norway, and Russia. The application of quantile unit root inference methods to test the specification of the PPP condition in the quantile process yields limited support to the equilibrium condition. However, the application of quantile cointegration methods that estimate the equilibrium relationship between national prices and the nominal exchange rate is much more supportive of a generalized PPP condition that varies across countries and quantiles. Our empirical findings suggest that the distribution of the nominal exchange rate reflects a nonlinear equilibrium relationship between national prices that varies widely between the central and tail quantiles and is country‐specific. [ABSTRACT FROM AUTHOR]

In this study, we apply the Quantile unit root test and revisit the Purchasing Power Parity (PPP) in 20 African countries using real effective exchange rates over the period 1971Q1 to 2012Q4. While traditional unit root tests fail to reject unit root hypothesis in most of the countries, results from Quantile unit root test reject unit root null hypothesis in Ghana, Mauritius, Niger, South Africa, and Togo, providing support for the PPP at least in these five countries. We further estimate the half-life based on Quantile autoregressive (QAR) model to be about 4.57-7.96 quarters (1-2 year). [ABSTRACT FROM AUTHOR]

The article looks at the potential of quantile unit root tests in assessment of purchasing power parity in 7 Eastern European nations. Topics discussed include countries covered in the study from 1998 to 2015 like Bulgaria, Russia and Czech Republic, benefits of quantile unit root tests, and effects of European Union-like trade polices towards the purchasing power parity of Eastern European countries.

Application of six different univariate unit root tests to real effective exchange rates of 23 OECD countries supports their stationarity or Purchasing Power Parity theory (PPP) only in five countries, a result consistent with previous research that is known as PPP puzzle. However, descriptive statistics of each effective rate reveals a clear sign of non-normal distribution. To account for this, we use quantile unit root test which allows impact of different shocks to be realized at different quantiles. When we applied this new test to the same rates, number of countries in which PPP is supported increased to 16. Apparently, incorporating effects of shocks improves testing efficiency and provides more support for the PPP and reduces the severity of the puzzle. [ABSTRACT FROM PUBLISHER]