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关注：1
2013-05-23 12:21
求翻译：For production security, hog vaccine cost (Vac-hog) had a positive impact on demand, however, sow vaccine cost (Vac_sow) had a negative impact on demand. The different signs could be attributed to the constituents of the subject pool. Out of the 187 farmers who were insured in 2009 (and hence had ins_now=1), 185 took s是什么意思？ 待解决
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- 离问题结束还有
For production security, hog vaccine cost (Vac-hog) had a positive impact on demand, however, sow vaccine cost (Vac_sow) had a negative impact on demand. The different signs could be attributed to the constituents of the subject pool. Out of the 187 farmers who were insured in 2009 (and hence had ins_now=1), 185 took s
问题补充： |
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