非洲留学生空间流动网络变化特征研究

Changes of spatial flow networks of African international students

基于2000—2018年非洲留学生流动数据,利用社会网络分析和负二项回归模型,探讨非洲留学生空间流动网络变化特征及其影响机制,其结果认为:①非洲留学生空间流动始终呈现以非洲至欧洲的南北流动为主要路径,以非洲向东西其他大洲扩展为次要路径的“蝶状”空间分布格局。②非洲留学生空间流动网络结构变化呈现显著的规模扩大和相对集聚特征,非洲留学生流动数量显著增加的同时,不同国家间的非洲留学生流动规模存在等级分布式的差距。③非洲留学生空间流动网络始终呈现核心-边缘结构特征,且非洲留学生空间流动网络节点之间的联系日益密切,非洲留学生同时向核心、次核心节点流动的集聚特征愈发显著。④影响因素分析表明:语言邻近性和历史殖民联系对非洲留学生空间流动的选择影响最大,其次为东道国高校教育水平,而集聚效应、贸易联系和地理距离的影响较小,东道国高校学生数、GDP差值和人均GDP差值的影响则最弱。

Based on the data of international students'flow from 2000 to 2018,social network analysis and negative binomial regression model are used to analyses the change of spatial networks of African students'flow and its influencing mechanism.The results show that:①The spatial flow of African international students always presents a"butterfly"spatial distribution pattern,with the north-south flow from Africa to Europe as the main path,and the expansion of Africa to other continents as the secondary path.②The change of spatial flow network structure of African international students shows significant scale expansion and relative agglomeration.While the number of African international student increases significantly,the scale of international African student among different countries has a hierarchical distribution gap.③The nodes of spatial flow network of African international students always present a core-edge structure,and the spatial flow network is increasingly closely connected.The clustering characteristics of African international students flowing to core and sub-core nodes are becoming increasingly significant.④Analysis of influencing factors shows that language proximity and historical colonial have the greatest influence on the choice of African international students,followed by the level of education in universities.In addition,agglomeration effect,trade connection,and geographical distance have little influence,while the number of college students in host country,GDP difference and per capita GDP difference have the least influence.