The relationship between urban mobility, social networks and socioeconomic status is complex and difficult to apprehend, notably due to the lack of data. Here we use mobile phone data to analyze the socioeconomic structure of spatial and social interaction in the Chilean's urban system. Based on the concept of spatial and social events, we develop a methodology to assess the level of spatial and social interactions between locations according to their socioeconomic status. We demonstrate that people with the same socioeconomic status preferentially interact with locations and people with a similar socioeconomic status. We also show that this proximity varies similarly for both spatial and social interactions during the course of the week. Finally, we highlight that these preferential interactions appear to be holding when considering city-city interactions.

翻译：城市流动性、社交网络与社会经济地位之间的关系复杂且难以理解，这主要源于数据匮乏。本研究利用手机数据分析了智利城市系统中空间与社会互动的社会经济结构。基于空间与社会事件的概念，我们提出了一种方法，用于评估不同地理位置间根据其社会经济地位所产生的空间与社会互动水平。研究表明，社会经济地位相同的人群更倾向于与具有相似社会经济地位的地理位置和人群互动。我们还发现，在一周内，这种邻近性在空间与社会互动中的变化模式相似。最后，我们强调，在考虑城市间互动时，这种偏好性互动模式依然存在。