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CSH Lecture Series on Network Inequality – with Balázs Lengyel

"Social network segregation and barriers of urban mobility" Social networks amplify inequalities by fundamental mechanisms of social tie formation such as homophily and triadic closure. These forces sharpen social segregation, which is reflected in a fragmented social network structure. Geographical impediments such as distance and physical or administrative boundaries also reinforce social segregation. In this talk, Lengyel gives an overview of our recent work providing evidence that urban mobility, social network structure, and income inequalities are interrelated. Investigating online social networks, he finds that fragmentation of social networks is higher in towns where residential neighborhoods are divided by physical boundaries such as railroads, major roads, or rivers. He shows that these urban geography features have significant relationships with income inequality via social network fragmentation. Then, using geo-located Twitter data in the 50 largest metropolitan areas in the US, he illustrates that social networks of residents from relatively poor neighborhoods are spatially concentrated around home. Those who commute to work to distant places may create ties that enrich their social capital. Traces of cell phone GPS coordinates, however, tell us that physical barriers in cities separate large shares of mobility. To mitigate urban inequalities, we need better access across barriers in cities and foster healthier social networks. About Balázs Lengyel: Balázs Lengyel is an economic geographer and works on topics at the intersection of economic geography, innovation studies, and network science. He aims to understand how social interaction facilitates economic and technological progress embedded in geographical space. He is the co-director of the ANETI Lab, an interdisciplinary group co-hosted by the Hungarian Research Network and Corvinus Institute for Advanced Studies focusing on agglomeration, networks, and innovation. He is an Associate Professor at the Corvinus University of Budapest, and is a board member of the Center for Collective Learning. Balázs was a visiting scholar at the MIT Human Mobility and Networks Lab in 2016; he completed his PhD in economics at the Budapest University of Technology and Economics in 2010 and holds a master degree from the University of Szeged. website: anet.krtk.mta.hu social media:   / blengyelb   Learn more about the Complexity Science Hub: https://csh.ac.at/   / complexity-science-hub     / cshvienna     / cshvienna     / cshvienna