| Variables | (1) | (2) | (3) | (4) | (5) | (6) |
| (1) ifi | 1.000 |
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| (2) policy | 0.108 | 1.000 |
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| (3) temperature | 0.435 | −0.370 | 1.000 |
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| (4) precipitation | −0.459 | −0.614 | 0.062 | 1.000 |
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| (5) sunshine | 0.007 | 0.224 | −0.100 | −0.673 | 1.000 |
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| (6) green_gdp | 0.213 | −0.304 | 0.546 | −0.114 | −0.144 | 1.000 |