(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | 0.433*** (0.0499) | 0.295*** (0.0252) | 0.327*** (0.0277) | 0.291*** (0.0297) |
Adjusted R2 | 0.134 | 0.883 | 0.939 | 0.954 |
Year effects | No | Yes, F = 14.14 | Yes, F = 1.66 | Yes, F = 1.92 |
Prob > F | 0.000 | 0.060 | 0.023 | |
State effects | No | Yes, F = 93.12 | Yes, F = 40.24 | Yes, F = 25.27 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 13.78 | Yes, F = 4.47 |
Prob > F | 0.000 | 0.000 | ||
State trend, quadratic | No | No | No | Yes, F = 5.48 |
Prob > F | 0.000 | |||
Total of observations | 480 | 480 | 480 | 480 |