ABSTRACT

This research assesses the empirical relevance of geography as a driver of the position of the nodes within a city network. We first propose a measure of the strength of network ties between municipalities based on the observed migratory flows and compute network centrality indexes to characterize the degree of embeddedness of each place. Second, we filter the network ties to account for the fact that a non-negligible fraction of the flows is induced by geographical proximity and, therefore, do not accurately measure the strength of the relationship between places. The empirical results (data from Spanish municipalities for the period 2001–16) suggest that network ties between municipalities, beyond those directly related to geographical proximity, explain, on average, about a third of network centrality.

摘要

这项研究评估了地理作为城市网络中节点位置驱动因素的经验相关性。我们首先根据观察到的迁移流量和计算网络中心性指数来衡量城市之间的网络联系强度，以表征每个地方的嵌入程度。其次，我们过滤网络联系以解释不可忽略的一部分流量是由地理接近引起的，因此不能准确地衡量地方之间关系的强度。实证结果（2001-16 年西班牙市政当局的数据）表明，市政当局之间的网络联系，除了与地理邻近性直接相关的联系之外，平均解释了大约三分之一的网络中心性。