| Variable | Sample | Treated | Controls | Difference | S.E. | T-stat | 
| kj | Unmatched | 74.88 | 73.01 | 1.87 | 1.41 | 1.32 | 
| 
 | ATT | 75.19 | 73.27 | 1.91 | 1.40 | 1.36 | 
| 
 | ATU | 73.01 | 74.88 | 1.86 | . | . | 
| 
 | ATE | 
 | 
 | 1.89 | . | . |