Chang, Tsangyao; Lee, Chia-Hao; Chou, Pei-I - In: Applied Economics Letters 19 (2012) 2, pp. 123-128
This study applies a simple and powerful nonlinear unit root proposed by Sollis (2009) to test the validity of long-run Purchasing Power Parity (PPP) in G-7 countries over the period January 1980 to September 2008. The empirical results indicate that PPP holds true for all G-7 countries, with...