Zeng, Jhih-Hong; Chang, Chun-ping; Lee, Chien-chiang - In: Economics Bulletin 31 (2011) 1, pp. 189-207
Over the last decade, there has been a growing interest in investigating agricultural commodity prices. We apply two more powerful smooth transition autoregressive models of the non-linear unit-root test - namely, the ESTAR model of Kapetanios et al. [Journal of Econometrics (2003)] and the...