Variable | Unmatched/Matched | Mean | % bias | % reduct |bias| | t-test | ||
Treated | Control | t | p > |t| | ||||
Nation | U | 0.81073 | 0.82202 | −2.9 |
| −0.69 | 0.492 |
M | 0.81055 | 0.81157 | −0.3 | 90.9 | −0.06 | 0.953 | |
Area | U | 0.37463 | 0.45033 | −15.4 |
| −3.63 | 0.000 |
M | 0.375 | 0.382 | −1.4 | 90.8 | −0.33 | 0.744 | |
Age | U | 12.271 | 12.575 | −17.6 |
| −4.14 | 0.000 |
M | 12.273 | 12.324 | −3.0 | 83.2 | -0.67 | 0.503 | |
Grade | U | 5.9649 | 6.3328 | −18.6 |
| −4.37 | 0.000 |
M | 5.9678 | 6.0159 | −2.4 | 86.9 | −0.55 | 0.581 | |
Gender | U | 0.54146 | 0.51904 | 4.5 |
| 1.06 | 0.290 |
M | 0.54102 | 0.53001 | 2.2 | 50.9 | 0.50 | 0.618 | |
Learning_eva | U | 2.7488 | 2.7666 | −2.1 |
| −0.49 | 0.628 |
M | 2.7485 | 2.7546 | −0.7 | 65.7 | −0.16 | 0.873 | |
Key_school | U | 0.2439 | 0.23344 | 2.5 |
| 0.58 | 0.563 |
M | 0.24414 | 0.24553 | −0.3 | 86.7 | −0.07 | 0.942 | |
Education_exp | U | 0.81073 | 0.78808 | 5.7 |
| 1.33 | 0.184 |
M | 0.81055 | 0.80718 | 0.8 | 85.1 | 0.19 | 0.846 | |
Education_m | U | 6.2634 | 6.6283 | −8.1 |
| −1.91 | 0.057 |
M | 6.2637 | 6.2232 | 0.9 | 88.9 | 0.20 | 0.838 | |
Education_f | U | 7.8302 | 7.7831 | 1.2 |
| 0.27 | 0.784 |
M | 7.8262 | 7.7376 | 2.2 | −87.9 | 0.51 | 0.613 | |
Child_num | U | 1.9776 | 1.8949 | 9.5 |
| 2.24 | 0.025 |
M | 1.9775 | 1.9649 | 1.5 | 84.7 | 0.32 | 0.748 | |
Ln_income | U | 8.7311 | 8.9191 | −15.9 |
| −3.72 | 0.000 |
M | 8.7316 | 8.7012 | 2.6 | 83.8 | 0.55 | 0.580 |