城市社会重叠的层级组织：共享社会空间如何与物理流动性分化
The hierarchical organization of urban social overlap: How shared social spaces diverge from physical mobility
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中文总结 AI 辅助
本研究通过巴西13个城市的共现网络，区分共位性与共连接性，发现社会重叠的层级组织弱于且异于流动性层级，从而分离移动、互动机会与社会重叠三个维度。
中文摘要 AI 辅助
城市通常通过人口密度、基础设施和流动性流来表征。这些量描述了人们在哪里以及他们如何移动，但移动并不能唯一地决定人群在何处反复相遇，也不能决定不同地点是否参与相同的社会环境。在此，我们构建了巴西13个城市的共现重叠网络，以区分城市组织的这些维度。我们引入了两个互补的度量：共位性（colocation），用于量化单个地点内的重复共现活动；以及共连接性（co-connectedness），用于衡量地点在多大程度上共享相同的共现对。我们发现，共位性的空间集中度与流动性的空间集中度存在显著差异，产生的社会中心在数量和位置上都可能不同于流动性中心。在网络层面，共连接性表现出一种非随机的层级组织，其中地点优先与活动水平相似的地点共享重复共现对。这种层级在系统性上弱于相应的流动性层级，并且在不同城市间表现出显著更大的变异性，这表明具有相似流动性组织的城市在重复社会重叠跨地点的组织方式上可能有所不同。最后，我们表明，共位性活动相对于居住中心的社会中心的空间邻近性提供了城市组织的补充空间维度。总之，这些结果区分了仅通过流动性表征城市时被混淆的三个特征：地点之间的移动、社会互动的本地机会，以及重复社会重叠跨地点的组织。
英文摘要
Cities are commonly characterized through population density, infrastructure, and mobility flows. These quantities describe where people are and how they move, but movement does not uniquely determine where populations repeatedly encounter one another or whether different locations participate in the same social environments. Here, we construct co-presence overlap networks across 13 Brazilian cities to distinguish these dimensions of urban organization. We introduce two complementary measures: colocation, which quantifies recurrent co-presence activity within individual locations, and co-connectedness, which measures the extent to which locations share the same co-present pairs. We find that the spatial concentration of colocation differs substantially from that of mobility, producing social centers that can differ in both number and location from mobility centers. At the network level, co-connectedness exhibits a non-random hierarchical organization in which locations preferentially share recurrent pairs with locations of similar activity. This hierarchy is systematically weaker and substantially more variable across cities than the corresponding mobility hierarchy, demonstrating that cities with similar mobility organization can differ in how recurrent social overlap is organized across locations. Finally, we show that the spatial proximity of colocation activity to social centers relative to residential centers provides a complementary spatial dimension of urban organization. Together, these results separate three features that are conflated when cities are characterized through mobility alone: movement between locations, local opportunities for social interaction, and the organization of recurrent social overlap across locations.
发表机构
- University of Rochester（罗切斯特大学）
- Constructor University（_constructor_大学）
- University of Exeter（埃克塞特大学）
机构由 AI 辅助整理，请以论文原文为准。
