variable

Test type

ADF test value

The critical value at the 1% level

The critical value at the 5% level

The critical value at the 10% level

conclusion

LnSZ

(0, 0, 3)

2.661

−2.606

−1.945

−1.613

non-stationary

LnSC

(0, 0, 4)

1.130

−2.607

−1.947

−1.613

non-stationary

LnGDP

(c, 0, 5)

−2.385

−3.555

−2.916

−2.596

non-stationary

LnCPI

(c, 0, 3)

−1.043

−3.550

−2.914

−2.594

non-stationary