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2013-05-23 12:21
求翻译：In the first set,for each leader firm in the sample, all the firms that had the same four digit SIC code as the leader firm were selected是什么意思？ 待解决
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- 离问题结束还有
In the first set,for each leader firm in the sample, all the firms that had the same four digit SIC code as the leader firm were selected
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