Table 2 Percentage bias before and after matching procedure
Variable | Status | Treated | Control | % Bias | % Reduced bias |
|---|---|---|---|---|---|
Women | Unmatched | 0.484 | 0.547 | − 12.7 | 88.5 |
Matched | 0.485 | 0.478 | 1.5 | ||
Socioeconomic status (St) | Unmatched | 0.750 | 0.714 | 3.3 | − 10.7 |
Matched | 0.745 | 0.784 | − 3.7 | ||
Ln income per capita (St) | Unmatched | 10.794 | 11.273 | − 69.4 | 97.2 |
Matched | 10.797 | 10.783 | 1.9 | ||
Father’s education (St) | Unmatched | − 0.480 | 0.175 | − 74.2 | 96.5 |
Matched | − 0.476 | − 0.499 | 2.6 | ||
Mother’s education (St) | Unmatched | − 0.479 | 0.180 | − 74.3 | 95.2 |
Matched | − 0.475 | − 0.507 | 3.5 | ||
Attendance 10th grade (St) | Unmatched | − 0.041 | 0.125 | − 17.8 | 83.0 |
Matched | − 0.041 | − 0.013 | − 3.0 | ||
GPA 10th grade (St) | Unmatched | − 0.292 | 0.184 | − 50.8 | 98.3 |
Matched | − 0.288 | − 0.280 | − 0.9 | ||
SIMCE language (St) | Unmatched | − 0.393 | 0.224 | − 66.7 | 97.8 |
Matched | − 0.389 | − 0.376 | − 1.5 | ||
SIMCE math (St) | Unmatched | − 0.465 | 0.227 | − 77.6 | 99.4 |
Matched | − 0.462 | − 0.466 | 0.5 | ||
School SES (St) | Unmatched | − 0.665 | 0.155 | − 151.6 | 92.3 |
Matched | − 0.660 | − 0.723 | 9.6 | ||
Rural school | Unmatched | 0.052 | 0.017 | 19.1 | 74.7 |
Matched | 0.052 | 0.060 | − 4.8 |