(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | 0.499*** (0.0723) | 0.332*** (0.0297) | 0.325*** (0.0335) | 0.262*** (0.0353) |
Adjusted R2 | 0.117 | 0.931 | 0.966 | 0.974 |
Year effects | No | Yes, F = 14.62 | Yes, F = 1.73 | Yes, F = 1.82 |
Prob > F | 0.000 | 0.074 | 0.058 | |
State effects | No | Yes, F = 130.2 | Yes, F = 99.79 | Yes, F = 69.51 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 11.00 | Yes, F = 3.41 |
Prob > F | 0.000 | 0.000 | ||
State trend, quadratic | No | No | No | Yes, F = 3.91 |
Prob > F | 0.000 | |||
Total of observations | 352 | 352 | 352 | 352 |