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论双边贸易研究中重力模型的距离因素 被引量:51

The Distance in the Gravity Model of Bilateral Trade
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摘要 重力模型广泛应用于双边贸易的研究。然而,该模型的重要解释变量之一距离的定义却是学术界争议的焦点。通常,学术界使用“直线距离”作为运输成本的近似衡量标准。但是,这一近似衡量标准往往不能很好地反映重力模型中的“排斥力”因素。本文将对重力模型中几种距离的定义展开讨论,除直线距离外,本文还引入了实际距离(区分海运距离和陆运距离)。此外,综合运输网络密度对运输成本的影响,笔者进一步提出“调整距离”的概念。本文通过计量经济方法比较了各种距离概念在重力模型中作为“排斥力”衡量标准的优劣程度,对传统重力模型进行了改进。
作者 骆许蓓
出处 《世界经济文汇》 CSSCI 北大核心 2003年第2期45-60,共16页 World Economic Papers
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