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2013-05-23 12:21
求翻译：The fixed-effects estimator is perhaps more preferable, however, as it does not rely on the assumption that i is uncorrelated with the other explanatory variables. Identification for this model comes from only variation year-to-year within companies. The advantage of having a是什么意思？ 待解决
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The fixed-effects estimator is perhaps more preferable, however, as it does not rely on the assumption that i is uncorrelated with the other explanatory variables. Identification for this model comes from only variation year-to-year within companies. The advantage of having a
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