Level

First Difference

Level of Significance

Order of Integration

t. Statistic

P. Value

t. Statistic

P. Value

RGDP

−1.046798

0.7226

−5.149141

0.0003

5%

1(1)

EXT

−0.378478

0.9003

−4.387133

0.0018

5%

1(1)

DDB

3.495196

1.0000

−3.673205

0.0104

5%

1(1)

Critical Values

Level

First Difference

1%

−3.679322

−3.689194

5%

−2.967767

−2.971853

10%

−2.622989

−2.625121