Bank Networks from Text: Interrelations, Centrality and Determinants
Sarlin, Peter; Rönnqvist, Samuel (2015)
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In the wake of the still ongoing global financial crisis, interdependencies among banks have come into focus in trying to assess systemic risk. To date, such analysis has largely been based on numerical data. By contrast, this study attempts to gain further insight into bank interconnections by tapping into financial discourse. We present a text-to-network process, which has its basis in co-occurrences of bank names and can be analyzed quantitatively and visualized. To quantify bank importance, we propose an information centrality measure to rank and assess trends of bank centrality in discussion. We also analyze determinants of information centrality to better understand driving factors behind the importance of banks in the network. For qualitative assessment of bank networks, we put forward a visual, interactive interface for better illustrating network structures. We illustrate the text-based approach on European Large and Complex Banking Groups (LCBGs) during the ongoing financial crisis by quantifying bank interrelations from discussion in 1.3M news articles, spanning the years 2007 to 2013.