|Table 3: Results of unit root tests.|
|Note: (1) *** and ** represent significance at the 1% and 5% levels, respectively.|
(2) The numbers shown in this table represent -value. , , and , respectively, denote the test equation computed with intercept, with linear trend and intercept and without intercept and linear trend. ADF and PP stand for augmented Dickey-Fuller and Phillips and Perron unit root tests, where the same critical values at 5% are −2.86, −3.14, −1.94 and at 1% are −3.43, −3.96, −2.57, respectively.