丝绸之路经济带沿线国家农产品贸易网络结构特征

Network Structure of Agricultural Product Trade in Countries of the Silk Road Economic Belt

在分析丝绸之路经济带沿线国家农产品贸易格局演变基础上,运用社会网络分析方法探究沿线国家农产品贸易网络结构特征。结果表明:①2010年以来,沿线国家农产品贸易整体呈现增长态势,德国、法国农产品贸易额始终处于第一位,中国与沿线国家农产品贸易空间分异明显,印度是中国最大农产品贸易伙伴。②沿线国家农产品贸易网络密度整体较高,农产品贸易关系密切,农产品贸易网络密度呈现先降后升的波动特征。③沿线国家农产品贸易网络三个中心度指标均存在明显的空间分异,重要节点国家稳中有变,核心国家和中介能力强的国家存在差异。④国家个数最多的凝聚子群包含的国家相对稳定,国家个数较少的五个凝聚子群的组团情况随着时间的推移变化很大,丝绸之路经济带农产品贸易网络呈现明显的'核心+半边缘+边缘'空间圈层结构特征。

Based on the pattern evolution analysis of the agricultural product trade in countries along the Silk Road Economic Belt,this paper explores their trade network structure characteristics of agricultural products applying the social network analysis method.Conclusions are drawn as follows:1)Since 2010,agricultural product trade in the countries along the Silk Road Economic Belt has been in a growth trend,and the trade volume of agricultural products between Germany and France has always been in the first place.It shows obvious spatial differentiation on agricultural product trade between China and countries along the'Silk Road Economic Belt',India is the largest agricultural product trading partner of China.2)The density of agricultural products trade network in the countries along the Silk Road Economic Belt is high and shows a fluctuating feature which is decreasing first and then rising.The agricultural products trade relationships in countries along the Silk Road Economic Belt are close.3)The three centrality indicators of the network have significant spatial differentiation,the important node countries change steadily,and there are differences between the core countries and the countries with strong intermediary ability in the network structure.4)The cohesive subgroups with the most countries have relatively stable structure,the remaining five cohesive subgroups which have a few countries change fast as time goes by.The agricultural products trade network of the countries along the Silk Road Economic Belt shows obvious characteristics of'core+half periphery+periphery'layer in spatial structure evolution.