(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | 0.394*** (0.0532) | 0.321*** (0.0271) | 0.300*** (0.0319) | 0.231*** (0.0345) |
Adjusted R2 | 0.133 | 0.896 | 0.943 | 0.955 |
Year effects | No | Yes, F = 8.85 | Yes, F = 2.22 | Yes, F = 1.18 |
Prob > F | 0.000 | 0.017 | 0.304 | |
State effects | No | Yes, F = 81.15 | Yes, F = 37.75 | Yes, F = 26.66 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 9.32 | Yes, F = 2.64 |
Prob > F | 0.000 | 0.000 | ||
State trend, quadratic | No | No | No | Yes, F = 3.32 |
Prob > F | 0.000 | |||
Total of observations | 352 | 352 | 352 | 352 |