Table 3.

Numerical results of the parallel trend test.

	Coefficients	Standard deviation	t	$P>|t|$
Before 6	0.026	0.016	1.650	0.100
Before 5	0.029	0.018	1.600	0.110
Before 4	0.020	0.014	1.400	0.162
Before 3	−0.014	0.014	−0.990	0.322
Before 2	0.002	0.017	0.120	0.905
Before 1	−0.046	0.025	−1.840	0.067
Current	−0.004	0.039	−0.110	0.914
After l	−0.314	0.054	−5.810	0.000
After 2	−0.286	0.058	−4.960	0.000
InduStru	−0.033	0.025	−1.340	0.182
Econ	−0.244	0.067	−3.650	0.000
Sci	−0.034	0.012	−2.790	0.006
Edu	−0.081	0.023	−3.490	0.001
Invest	−0.010	0.007	−1.420	0.157
Temp	0.082	0.033	2.500	0.013
Wind	−0.005	0.007	−0.760	0.447
Hum	0.022	0.024	0.910	0.363