| Treated | Comparison | Difference | s.e | t |
---|
Unmatched | 0.20 | 0.26 | − 0.05 | 0.02 | − 2.50 |
ATT | 0.21 | 0.22 | − 0.01 | 0.03 | − 0.22 |
- Approximate standard errors are calculated for the treatment effects assuming independent observations, fixed weights, homoscedasticity of the outcome variable within the treated and within the control groups and that the variance of the outcome does not depend on the propensity score [15]