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Quantile unit root test and the PPP in Africa

Mohsen Bahmani-Oskooee (), Tsangyao Chang (), Tsung-Hsien Chen and Han-Wen Tzeng

Applied Economics, 2017, vol. 49, issue 19, 1913-1921

Abstract: 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).

Date: 2017
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