Nieh, Chien-chung; Yao, Hsueh-chu - In: Advances in management & applied economics 3 (2013) 2, pp. 179-192
In this study, we used the PSTR (panel smooth transition regression) model to investigate the nonlinear relationship between beta (systematic risk) and returns (world market excess returns) for net oil export and net oil import groups. We set the volatility of world market excess return as the...