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CSD test.
| Variables | Pesaran's test | Frees'test | Friedman's test |
|---|---|---|---|
| CO2 | 24.367 (0.000) | 8.657 (0.021) | 137.691 (0.000) |
| ECI | 9.740 (0.000) | 5.684 (0.017) | 67.776 (0.000) |
| URB | 0.757 (0.054) | 2.856 (0.005) | 18.393 (0.495) |
| ICT | 7.699 (0.000) | 2.877 (0.010) | 64.671 (0.000) |
| HE | 21.082 (0.000) | 9.562 (0.006) | 142.021 (0.000) |
| GI | 27.622 (0.000) | 12.674 (0.001) | 138.873 (0.000) |
