Test

s = 48, n = 300

s = 48, n = 1100

s = 78, n = 500

s = 78, n = 2000

ADF (t-statistics)

−12.7408^*

−14.3546^*

−15.3429^*

−19.6710^*

GPH (d value)

0.2264

0.2126

0.2435

0.2577

GSP (d value)

0.1798

0.2191

0.2657

0.2471