「國際貿易前沿速遞」第294篇推送
J.M.C. Santos Silva, Silvana Tenreyro和 KehaiWei在<Journal of International Economics>(93,67-75 , 2013)上發表論文「Estimating the extensive margin of trade」，討論在關於extensive margin的估計中「double bound」的處理問題。
中文摘要：對貿易政策進行評估需要理解和定量分析一國企業出口產品類別數量的決定因素。然而，由於被解釋變量（出口產品類別）同時有下界和上界。進而基於條件均值的偏效應不是固定的，從而給估計帶來挑戰。文章指出，忽視下界和上界會導致錯誤結論。文章提出了處理這種「雙重界」問題的一種靈活的模型。文章實證表明，這種方法得出的結論與既有實證得出的結論存在較大的差異。
Abstract: Understanding and quantifying the determinants of the number of sectors or firms exporting in a given country is of relevance for the assessment of trade policies. Estimation of models for the number of exporting sectors, however, poses a challenge because the dependent variable has both a lower and an upper bound, implying that the partial effects of the explanatory variables on the conditional mean of the dependent variable cannot be constant. We argue that ignoring these bounds can lead to erroneous conclusions and propose a flexible specification that accounts for the doubly-bounded nature of the dependent variable. We empirically investigate the problem and the proposed solution, finding significant differences between estimates obtained with the proposed estimator and those obtained with standard approaches.
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微信公眾帳號「國際貿易前沿速遞」每日推送國際貿易與國際投資相關前沿內容。本帳號由上海財經大學國際工商管理學院李雪玉博士及其團隊負責。本文由上海財經大學國際工商管理學院羅勝強博士提供。
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