| 000 | 00500pam a2200181a 44500 | ||
|---|---|---|---|
| 008 | 170807b1998 xxu||||| |||| 00| 0 eng d | ||
| 020 | _a | ||
| 082 | _aWP 6829 | ||
| 100 | _aDehejia, Rajeev H | ||
| 245 | _aPropensity score matching methods for non-experimental casual studies | ||
| 260 |
_aCambridge, MA _bNBER _c1998 |
||
| 300 | _a22p | ||
| 490 | _aNBER Working Paper Series | ||
| 700 | _aWahba Sadek | ||
| 700 | _aNational Bureau Of Economic Research | ||
| 906 | _a44646 | ||
| 942 |
_2ddc _cG |
||
| 999 |
_c133207 _d133207 |
||