| (1) | (2) | (3) | (4) | (5) | (6) |
Variable | Green invention patent | Green invention patent | Green utility model patent | Green utility model patent | Green general patent | Green general patent |
Low*industry*time | 0.338*** | 0.305*** | 0.455*** | 0.409*** | 0.760*** | 0.710*** |
| (6.65) | (6.38) | (10.21) | (9.32) | (16.65) | (16.13) |
Low*industry | 0.506*** | 0.473*** | 0.673*** | 0.630*** | 1.073*** | 1.019*** |
| (13.26) | (13.35) | (19.33) | (18.69) | (30.49) | (31.30) |
Time*industry | 0.944*** | 0.817*** | 0.955*** | 0.829*** | 1.409*** | 1.272*** |
| (35.15) | (31.94) | (38.93) | (33.72) | (56.63) | (51.29) |
Time*low | 0.045*** | −0.059*** | 0.029*** | −0.071*** | 0.039*** | −0.070*** |
| (4.34) | (−3.80) | (2.98) | (−4.86) | (3.78) | (−4.49) |
cfo |
| 0.001 |
| 0.000 |
| 0.000 |
|
| (1.52) |
| (0.69) |
| (1.04) |
Tobin Q |
| 0.000*** |
| 0.000*** |
| 0.000*** |
|
| (7.70) |
| (8.38) |
| (11.10) |
btm |
| 0.000*** |
| 0.000* |
| 0.000*** |
|
| (2.92) |
| (1.80) |
| (2.70) |
Size |
| 0.100*** |
| 0.085*** |
| 0.110*** |
|
| (6.68) |
| (6.39) |
| (7.52) |
Lev |
| 0.001*** |
| 0.001*** |
| 0.001*** |
|
| (4.40) |
| (4.76) |
| (4.46) |
Netprofit |
| 0.001** |
| 0.001*** |
| 0.002*** |
|
| (2.11) |
| (3.07) |
| (2.70) |
lnfirst |
| −0.033 |
| −0.051* |
| −0.047* |
|
| (−1.19) |
| (−1.96) |
| (−1.67) |
Age |
| 0.007 |
| 0.023** |
| 0.008 |
|
| (0.60) |
| (1.97) |
| (0.63) |
Time | control | control | control | control | control | control |
Company | control | control | control | control | control | control |