lntrade |
|
| −0.0463** | −0.0494** |
|
|
| (0.0194) | (0.0193) |
lnmobile |
|
|
| 0.0915** |
|
|
|
| (0.0406) |
ipv4 |
|
|
| 7.7573** |
|
|
|
| (3.9371) |
_cons | 10.8233*** | 10.2963*** | 10.5459*** | 9.6298*** |
| (0.4595) | (0.4774) | (0.4869) | (0.5849) |
N | 651 | 651 | 651 | 651 |
r2 | 0.5797 | 0.5888 | 0.5927 | 0.5987 |
时间效应 | 控制 | 控制 | 控制 | 控制 |