Propensity score matching methods for non-experimental causal studies
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | Saesneg |
| Cyhoeddwyd: |
Cambridge
National Bureau of Economic Research
1998.
|
| Cyfres: | NBER working paper series
no.6829 |
| Pynciau: |