Selection on observed and unobserved variables : assessing the effectiveness of catholic schools
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| 其他作者: | , |
| 格式: | 圖書 |
| 語言: | English |
| 出版: |
Cambridge
National Bureau of Economic Research
2000.
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| 叢編: | NBER working paper series
no.7831 |
| 主題: |