(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | 0.308*** (0.0666) | 0.213*** (0.0351) | 0.194*** (0.0393) | 0.154*** (0.0435) |
Adjusted R2 | 0.055 | 0.862 | 0.927 | 0.940 |
Year effects | No | Yes, F = 6.56 | Yes, F = 1.47 | Yes, F = 1.39 |
Prob > F | 0.000 | 0.149 | 0.182 | |
State effects | No | Yes, F = 65.08 | Yes, F = 37.15 | Yes, F = 25.34 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 9.95 | Yes, F = 2.15 |
Prob > F | 0.000 | 0.001 | ||
State trend, quadratic | No | No | No | Yes, F = 2.93 |
Prob > F | 0.000 | |||
Total of observations | 352 | 352 | 352 | 352 |