Double trouble on the value of twins-based estimation of the return to schooling
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Cambridge
National Bureau of Economic Research
1998.
|
| Cyfres: | NBER working paper series
no.6721 |
| Pynciau: |