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Is per capita real GDP stationary in African countries? Evidence from panel SURADF test
Chang, Tsangyao, (2006)
Does PPP hold in African countries? Further evidence based on a highly dynamic non-linear (logistic) unit root test
Does Rational Bubbles Exist in the Taiwan Stock Market? Evidence from a Nonparametric Cointegration Test
Chang, Tsangyao, (2005)