Table 6 Difference checking before and after PSM matching.
Unmatched | Mean | %reduct | t-test | ||||
|---|---|---|---|---|---|---|---|
Variable | Matched | Treated | Control | %bias | |bias| | t | p > t |
FirmAge | U | 5.482 | 5.140 | 16.000 | 2.660 | 0.008 | |
M | 5.482 | 5.451 | 1.500 | 90.900 | 0.190 | 0.849 | |
FirmSize | U | 19.500 | 10.555 | 37.800 | 6.870 | 0.000 | |
M | 19.500 | 18.112 | 5.900 | 84.500 | 0.640 | 0.520 | |
FirmType | U | 0.014 | 0.330 | −92.100 | −12.540 | 0.000 | |
M | 0.014 | 0.014 | −0.000 | 100.000 | −0.000 | 1.000 | |
OwnerGender | U | 0.259 | 0.275 | −3.600 | −0.590 | 0.556 | |
M | 0.259 | 0.251 | 1.900 | 46.500 | 0.260 | 0.796 | |
OwnerAge | U | 38.433 | 41.767 | −35.700 | −5.660 | 0.000 | |
M | 38.433 | 38.057 | 4.000 | 88.700 | 0.590 | 0.553 | |
LowerHighSchool | U | 0.389 | 0.606 | −44.400 | −7.380 | 0.000 | |
M | 0.389 | 0.361 | 5.800 | 87.000 | 0.770 | 0.439 | |
HigherCollege | U | 0.603 | 0.380 | 45.600 | 7.590 | 0.000 | |
M | 0.603 | 0.631 | −5.800 | 87.300 | −0.770 | 0.441 | |
