| (1) | (2) | (3) | (4) |
risk | risk | risk | risk | |
index | 0.0184*** |
|
|
|
(0.00463) |
|
|
| |
coverage |
| 0.0134*** |
|
|
| (0.00512) |
|
| |
usage |
|
| 0.0152*** |
|
|
| (0.00331) |
| |
digitization |
|
|
| 0.00603** |
|
|
| (0.00248) | |
hhi | −0.932** | −1.161*** | −1.241*** | −1.270*** |
(0.363) | (0.380) | (0.324) | (0.326) | |
hhi × index | 0.121** |
|
|
|
(0.0487) |
|
|
| |
hhi × coverage |
| 0.0842* |
|
|
| (0.0511) |
|
| |
hhi × usage |
|
| 0.0895* |
|
|
| (0.0466) |
| |
hhi × digitization |
|
|
| 0.0954*** |
|
|
| (0.0357) | |
控制变量 | 控制 | 控制 | 控制 | 控制 |
_cons | 2.900*** | 3.464*** | 3.203*** | 2.361*** |
(0.654) | (0.643) | (0.643) | (0.739) | |
固定效应 | 控制 | 控制 | 控制 | 控制 |
N | 1600 | 1600 | 1600 | 1600 |
R2 | 0.919 | 0.918 | 0.919 | 0.918 |
adj. R2 | 0.909 | 0.909 | 0.909 | 0.909 |