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利用2001-2010年221个国家的双边贸易数据计算各国间的国际贸易区位选择偏好指数,据此构建国际贸易区位选择偏好网络,并根据偏好水平对网络进行等级划分。在此基础上,选择与偏好问题紧密相关的网络互惠性、同配性和集聚性三方面指标,分析不同等级、不同年份的出口和进口偏好网络的结构特征及其演变过程。研究结果发现,国际贸易偏好网络中更多为弱偏好连接,而且偏好程度越高的国际贸易偏好网络稳定性越强。国际贸易偏好网络的互惠性和集聚性都会随着偏好水平提升有所下降,但同配系数则出现较大波动。此外,进口偏好网络相比进口偏好网络具有较高的互惠性和异配性,但集聚性却较低。
Based on the bilateral trade data of 221 countries in 2001-2010, the international trade location preference index of each country was calculated. Based on this, a preference network of international trade location selection was constructed and the network was divided according to the preference level. On this basis, we select three indicators of network reciprocity, homomorphism and agglomeration that are closely related to the preference problem, and analyze the structural characteristics and evolution process of export and import preference networks of different grades and years. The results show that the international trade preference network more for the weak preference connection, and the more preference the stronger the stability of the international trade preference network. The reciprocity and agglomeration of international trade preference network will decrease with the increase of preference level, but the coefficient of congruence will fluctuate greatly. In addition, the import preference network has a higher degree of reciprocity and heterogeneity than the import preference network, but the aggregation is rather low.