Naslov
Causal motifs and existence of endogenous cascades in directed networks with application to company defaults

Autori
Barjašić, Irena ; Štefančić, Hrvoje ; Pribičević, Vedrana ; Zlatić, Vinko

Izvornik
Scientific reports (2045-2322) 11 (2021); 24028, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
inference on networks ; contact processes ; systemic risk and economic networks

Sažetak
Motivated by the detection of cascades of defaults in economy, we developed a detection framework for an endogenous spreading based on causal motifs we define in this paper. We assume that the change of state of a vertex can be triggered by an endogenous or an exogenous event, that the underlying network is directed and that times when vertices changed their states are available. In addition to the data of company defaults, we also simulate cascades driven by different stochastic processes on different synthetic networks. We show that some of the smallest motifs can robustly detect endogenous spreading events. Finally, we apply the method to the data of defaults of Croatian companies and observe the time window in which an endogenous cascade was likely happening.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne prirodne znanosti

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