(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | 0.394*** (0.0532) | 0.435*** (0.0257) | 0.303*** (0.0307) | 0.215*** (0.0323) |
Adjusted R2 | 0.133 | 0.871 | 0.941 | 0.955 |
Year effects | No | No | No | No |
Prob > F | ||||
State effects | No | Yes, F = 65.41 | Yes, F = 38.10 | Yes, F = 29.19 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 13.28 | Yes, F = 2.69 |
Prob > F | 0.000 | 0.000 | ||
State trend, quadratic | No | No | No | Yes, F = 3.82 |
Prob > F | 0.000 | |||
Total of observations | 352 | 352 | 352 | 352 |