关键词: 出口边际, 社会网络分析, 网络特征, 适度区间

Abstract: Based on the large sample data of bilateral trade among 218 countries, including 5017 products in HS-6 digits from 1995 – 2013 in the BACI database, this paper constructs the network of extensive and intensive export margins, and explores the moderate intervals of the matching identity in the dual network in the respect of “linkages” taking the national identity and positions of each country in the whole export network into account. The research results present that there exists the axis and spoke” pattern in the network of extensive export margins, while the structural distribution of the intensive export margin network is comparatively balanced; China plays a "bridge" and "hub" role in the extensive margin network, but the export destination and import origin countries need to be extended. One country should match its export extension with its moderate export intensity. Although the product-country pairs of China's exports are extensive enough, the export concentration of those products, such as textile, clothing and footwear products, other low tech products, processed products, engineering products and electric equipment still goes beyond the moderate interval.

Key words: Export Margins, Social Network Analysis, Network Characteristics, Moderate Interval