| (1) | (2) | (3) | (4) | (5) | (6) |
Lnpatent1 | 1.023*** (0.150) | 0.910*** (0.150) | 0.880*** (0.151) | 0.783*** (0.157) | 0.723*** (0.160) | 0.718*** (0.145) |
Lnpatent2 | 0.206*** (0.116) | 0.265*** (0.120) | 0.217*** (0.116) | 0.244*** (0.096) | 0.255*** (0.100) | 0.203*** (0.110) |
lngd | −0.176 (0.199) | −0.110 (0.200) | −0.109 (0.960) | −0.110 (0.186) | −0.110 (0.188) | −0.157 (0.174) |
in |
| 0.568** (0.257) | 0.639** (0.256) | 0.670*** (0.258) | 0.634** (0.283) | 0.427** (0.290) |
re |
|
| 0.343* (0.190) | 0.345* (0.178) | 0.402** (0.203) | 0.437** (0.120) |
gdp |
|
|
| 0.056*** (0.281) | 0.068*** (0.293) | 0.080*** (0.319) |
tig |
|
|
|
| −1.114* (0.862) | −1.580* (0.945) |
lan |
|
|
|
|
| 1.613* (0.961) |
constant | −6.218* (3.617) | −8.985** (3.693) | −8.920** (3.714) | −8.688** (3.943) | −7.663** (4.025) | −6.167** (3.825) |
observations | 450 | 450 | 450 | 450 | 450 | 450 |