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arXiv 1105.5891q-fin.GNphysics.soc-ph
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出口多样性与国家经济规模的“S”曲线关系

The "S" Curve Relationship between Export Diversity and Economic Size of Countries

Lunchao Hu, Kailan Tian, Xin Wang, Jiang Zhang

摘要:

1971-2000年世界各国之间的国际贸易数据表明,出口商品种类与一国的GDP(国内生产总值)的对数呈S型关系。这表明所有国家都可以相应地分为三个阶段。第一,穷国出口的产品种类总是很少,这是我们所期望的。第二,一旦一个国家的经济规模(国内生产总值)超过一个阈值,其出口多样性可能会急剧增加。然而,富裕国家的情况并非如此,因为当其国内生产总值高于另一个阈值时,就会出现出口多样性的上限。尽管拟合S形函数的具体参数可能随时间变化,但这种模式在不同年份非常稳定。此外,我们还讨论了其他关系,如进口多样性与对数GDP,出口商多样性与出口商品数量等,所有这些关系都显示出S形或幂律模式。虽然本文没有解释S形曲线的起源,但它可能为经济多样性提供一个基本的经验事实和见解。

英文摘要:

The highly detailed international trade data among all countries in the world during 1971-2000 shows that the kinds of export goods and the logarithmic GDP (gross domestic production) of a country has an S-shaped relationship. This indicates all countries can be divided into three stages accordingly. First, the poor countries always export very few kinds of products as we expect. Second, once the economic size (GDP) of a country is beyond a threshold, its export diversity may increase dramatically. However, this is not the case for rich countries because a ceiling on the export diversity is observed when their GDPs are higher than another threshold. This pattern is very stable for different years although the concrete parameters of the fitting sigmoid functions may change with time. In addition, we also discussed other relationships such as import diversity with respect to logarithmic GDP, diversity of exporters with respect to the number of export goods etc., all of these relationships show S-shaped or power law patterns. Although this paper does not explain the origin of the S-shaped curve, it may provide a basic empirical fact and insights for economic diversity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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