| 000 | 00591nam#a2200205#c#4500 | ||
|---|---|---|---|
| 003 | IEF | ||
| 005 | 20180219164520.0 | ||
| 008 | 960130s1995 uuu##d#fr####| 0||u| |u | ||
| 040 | _aIEF | ||
| 100 | 1 |
_aHeckman, James Joseph _920868 |
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| 245 | _aInstrumental variables: a cautionary tale | ||
| 260 |
_aCambridge (Mass.) _bNational Bureau of Economic Research _c1995 |
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| 300 |
_av., graf. _c22 cm. |
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| 500 | _aConclusiones.-Bibliografía | ||
| 490 | _aNBER. Technical Working Papers; 185 | ||
| 650 | 4 |
_aVARIABLES ESTADISTICAS _948670 |
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| 942 | _cLIB | ||
| 942 | _z83656 | ||
| 999 |
_c89716 _d89716 |
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