We develop unit root tests that allow under the alternative hypothesis for a smooth transition between deterministic linear trends, around which stationary asymmetric adjustment may occur by employing exponential smooth transition auto-regressive (ESTAR) models The small sample properties of the...

The purpose of this study is to re-examine the convergence hypothesis both linear and nonlinear time series techniques for 21 OECD countries during the period of 1950-2008. The linear augmented Dickey Fuller (ADF) test results support the existence of a unit root which means that there is...

We utilize non-linear models to examine the stationarity of oil prices (Brent, Dubai, WIT and World) over the period 1973:2-2011:2. Real oil prices are calculated and expressed in the domestic currencies of seven Asian countries (Indonesia, Japan, Korea, Malaysia, the Philippines, Singapore and...