Double trouble on the value of twins-based estimation of the return to schooling
| 1. autor: | |
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| Kolejni autorzy: | |
| Format: | Książka |
| Język: | English |
| Wydane: |
Cambridge
National Bureau of Economic Research
1998.
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| Seria: | NBER working paper series
no.6721 |
| Hasła przedmiotowe: |