arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.12655econ.EM
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国家依赖与贸易边际中的未观测异质性

State Dependence and Unobserved Heterogeneity in the Extensive Margin of Trade

Julian Hinz, Amrei Stammann, Joschka Wanner

摘要:

我们研究的作用和驱动力的持久性在双边贸易的广泛利润。基于一个具有市场进入成本的国际贸易异质厂商模型,我们考虑了动态三向固定效应二元选择模型,并研究了相应的附带参数问题。标准的最大似然估计量在所有面板维度以恒定速率增长的渐近性下是一致的,但它在其极限分布中具有渐近偏差,即使在偏差看起来很小的情况下也使推断无效。因此,我们提出了两个不同的偏差校正估计。蒙特卡罗模拟证实了它们所需的统计特性。我们应用这些估计在重新评估的最常见的研究广泛的贸易差额的决定因素。真实的国家依赖性和未观察到的异质性都对贸易持续性做出了很大贡献,考虑到这种持续性,在确定贸易政策对广泛利润的影响方面具有重要意义。

英文摘要:

We study the role and drivers of persistence in the extensive margin of bilateral trade. Motivated by a stylized heterogeneous firms model of international trade with market entry costs, we consider dynamic three-way fixed effects binary choice models and study the corresponding incidental parameter problem. The standard maximum likelihood estimator is consistent under asymptotics where all panel dimensions grow at a constant rate, but it has an asymptotic bias in its limiting distribution, invalidating inference even in situations where the bias appears to be small. Thus, we propose two different bias-corrected estimators. Monte Carlo simulations confirm their desirable statistical properties. We apply these estimators in a reassessment of the most commonly studied determinants of the extensive margin of trade. Both true state dependence and unobserved heterogeneity contribute considerably to trade persistence and taking this persistence into account matters significantly in identifying the effects of trade policies on the extensive margin.

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