Table 2 Results of unit root test.
From: Linear and non-linear impact of key agricultural components on greenhouse gas emissions
Variables | ADF | PP | KPSS | |||
|---|---|---|---|---|---|---|
Level | First difference | Level | First difference | Level | First difference | |
lnGHG | 1.149 | −6.665*** | 0.962 | −6.666*** | 0.707*** | 0.131* |
lnAGL | −6.646*** | −6.033*** | 1.924 | −5.991*** | 0.295*** | 0.142** |
lnFC | −0.235 | −5.099*** | −2.027*** | −4.936*** | 0.658*** | 0.152** |
lnEUA | −0.919 | −4.559*** | −1.654 | −6.511*** | 0.727*** | 0.094 |
lnCPI | 0.561 | −7.641*** | 3.88 | −8.685*** | 0.723*** | 0.189** |
lnLPI | −2.507 | −7.126*** | −24.054 | −5.367*** | 0.677*** | 0.126 |
lnFP | 2.383 | −4.089*** | −4.977 | −5.835*** | 0.452*** | 0.109*** |
lnAVA | −0.809 | −6.061*** | −1.712 | −7.671*** | 0.729*** | 0.500*** |
lnFL | −1.775 | −5.851*** | −3.358** | −5.853*** | 0.732*** | 0.150 |
