| Variance Decomposition of L(CH4) | |||||||||
| Period | S.E. | L(CH4) | L(GDPP) | L(GDPP)2 | L(CPIN) | L(EUP) | L(OIL) | L(TOP) | L(FDI) |
| 1 | 0.084 | 100.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| 2 | 0.123 | 80.9183 | 0.254 | 6.039 | 1.365 | 3.178 | 3.155 | 3.076 | 2.015 |
| 3 | 0.145 | 77.591 | 0.554 | 5.157 | 1.186 | 3.290 | 2.830 | 5.997 | 3.395 |
| 4 | 0.165 | 73.040 | 0.746 | 5.120 | 1.346 | 3.083 | 2.269 | 9.286 | 5.112 |
| 5 | 0.185 | 72.230 | 0.669 | 4.055 | 1.160 | 2.965 | 1.977 | 9.605 | 7.339 |
| 6 | 0.203 | 69.111 | 0.654 | 3.384 | 1.121 | 2.718 | 2.287 | 12.173 | 8.554 |
| 7 | 0.219 | 67.479 | 0.630 | 3.244 | 1.025 | 2.526 | 2.558 | 13.756 | 8.781 |
| 8 | 0.237 | 64.686 | 0.556 | 3.020 | 0.914 | 2.546 | 3.126 | 16.016 | 9.137 |
| 9 | 0.255 | 62.109 | 0.505 | 3.157 | 0.893 | 2.491 | 3.712 | 18.042 | 9.091 |
| 10 | 0.273 | 59.719 | 0.465 | 3.320 | 0.846 | 2.587 | 4.152 | 20.128 | 8.785 |