| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| x1 | 0.246*** (0.010) | |||
| x2 | 0.223*** (0.010) | |||
| x3 | 0.074* (0.042) | |||
| x4 | 0.331*** (0.031) | |||
| c1 | 0.021** (0.009) | 0.024*** (0.009) | 0.098*** (0.015) | 0.049*** (0.013) |
| c2 | -0.016** (0.008) | -0.016** (0.008) | -0.052*** (0.014) | -0.031*** (0.012) |
| c3 | 0.006*** (0.002) | 0.005*** (0.002) | 0.014*** (0.003) | 0.010*** (0.002) |
| c4 | 0.071*** (0.015) | 0.074*** (0.015) | 0.236*** (0.023) | 0.116*** (0.022) |
| _cons | 19.413*** (1.306) | 19.479*** (1.325) | 5.279** (2.218) | 12.108*** (1.835) |
| N | 300 | 300 | 300 | 300 |
| r2 | 0.852 | 0.849 | 0.540 | 0.677 |