(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Unilateral | ||||
First 2 years | 0.336*** (0.0765) | 0.285*** (0.0322) | 0.276*** (0.0332) | 0.216*** (0.0367) |
Years 3 and 4 | 0.424*** (0.0804) | 0.371*** (0.0351) | 0.363*** (0.0454) | 0.215*** (0.0615) |
5 years or more | 0.482*** (0.126) | 0.299*** (0.0559) | 0.259*** (0.0839) | 0.0347 (0.109) |
Adjusted R2 | 0.131 | 0.897 | 0.945 | 0.956 |
Year effects | No | Yes, F = 7.82 | Yes, F = 1.67 | Yes, F = 1.37 |
Prob > F | 0.000 | 0.086 | 0.193 | |
State effects | No | Yes, F = 82.08 | Yes, F = 38.59 | Yes, F = 27.09 |
Prob > F | 0.000 | 0.000 | 0.000 | |
State trend, linear | No | No | Yes, F = 9.63 | Yes, F = 2.54 |
Prob > F | 0.000 | 0.000 | ||
State trend, quadratic | No | No | No | Yes, F = 3.16 |
Prob > F | 0.000 | |||
Equality of coefficients | F = 0.63 | F = 2.58 | F = 5.26 | F = 3.10 |
Prob > F | 0.535 | 0.077 | 0.005 | 0.046 |
Total of observations | 352 | 352 | 352 | 352 |