Analysis of the heterogeneity of green patent types
| Variables | IGpat | p-value | UGpat | p-value |
|---|---|---|---|---|
| ESG | 0.091*** | 0.010 | 0.063*** | 0.009 |
| Age | −0.029 | 0.020 | −0.108*** | 0.019 |
| Size | 0.495*** | 0.011 | 0.385*** | 0.010 |
| Lev | 0.050 | 0.068 | 0.294*** | 0.062 |
| Growth | 0.050* | 0.024 | 0.082*** | 0.023 |
| RD | 0.027*** | 0.003 | 0.001 | 0.003 |
| Indep | 0.320 | 0.183 | 0.292 | 0.169 |
| TobinQ | 0.032*** | 0.005 | 0.021*** | 0.005 |
| Duality | −0.026 | 0.025 | −0.005 | 0.023 |
| _cons | −10.107*** | 0.252 | −7.033*** | 0.232 |
| Ind | Yes | Yes | ||
| Year | Yes | Yes | ||
| r2_a | 0.383 | 0.406 | ||
| F | 0.378 | 0.401 | ||
| Variables | IGpat | UGpat | ||
|---|---|---|---|---|
| ESG | 0.091*** | 0.010 | 0.063*** | 0.009 |
| Age | −0.029 | 0.020 | −0.108*** | 0.019 |
| Size | 0.495*** | 0.011 | 0.385*** | 0.010 |
| Lev | 0.050 | 0.068 | 0.294*** | 0.062 |
| Growth | 0.050* | 0.024 | 0.082*** | 0.023 |
| RD | 0.027*** | 0.003 | 0.001 | 0.003 |
| Indep | 0.320 | 0.183 | 0.292 | 0.169 |
| TobinQ | 0.032*** | 0.005 | 0.021*** | 0.005 |
| Duality | −0.026 | 0.025 | −0.005 | 0.023 |
| _cons | −10.107*** | 0.252 | −7.033*** | 0.232 |
| Ind | Yes | Yes | ||
| Year | Yes | Yes | ||
| r2_a | 0.383 | 0.406 | ||
| F | 0.378 | 0.401 | ||
Note(s): ***, ** and * indicate significant confidence levels at 1, 5 and 10%, respectively
Source(s): Developed by the authors
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