Table 7.
Robustness test 1.
| (1) | (2) | (3) | (4) | (5) | |
|---|---|---|---|---|---|
| W 1 | W 2 | W 3 | W 4 | W 5 | |
| ρ | 0.2557*** | 0.2206** | 0.2513*** | 0.2164*** | 0.2330*** |
| (3.2110) | (3.1981) | (3.8833) | (3.6052) | (3.0174) | |
| Internet 2 | −0.0253* | −0.0261** | −0.0219* | −0.0224** | −0.0211** |
| (−1.8155) | (−2.0054) | (−1.7781) | (−2.1044) | (−2.0078) | |
| d-internet | 0.0202** | 0.0213** | 0.0207* | 0.0220** | 0.0241** |
| (2.1009) | (2.1167) | (1.8906) | (2.0911) | (2.1830) | |
| Control variable | Yes | Yes | Yes | Yes | Yes |
| Region effect | Yes | Yes | Yes | Yes | Yes |
| Time effect | Yes | Yes | Yes | Yes | Yes |
| Province | 30 | 30 | 30 | 30 | 30 |
| Observations | 310 | 310 | 310 | 310 | 310 |
*, **, *** denote variables significant at the 10, 5, and 1% levels, respectively, and values in parentheses are t-values.