Jan 09 2011 Jhih-Hong Zeng , Chun-ping Chang and Chien-chiang Lee   Are Fruit and Vegetable Prices Non-linear Stationary? Evidence from Smooth Transition Autoregressive Models   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Oct 02 2009 Vasudeva N. R. Murthy and Emmanuel Anoruo   Are Per Capita Real GDP Series in African Countries Non-stationary or Non-linear? What does Empirical Evidence Reveal?   Abstract  Contact Information  Citation  Full Text  -  Note