Toward a Behavioral Model of “Homegrown” Radicalization Trajectories

Age-structured social interactions enhance radicalization

“…In particular, all non-violent steps are condensed in the intermediate activist stage, between the general non-radical population and the violence-prone extremists. We may increase the number of stages as done in previous age-independent work [12][13][14][15][16][17] for a more nuanced progression to radicalization, but we expect qualitatively similar results to what showed here for a linear pathway. Our model may be best used to approximate a slowly evolving society, where the populations are given sufficient time to relax toward quasistatic conditions, allowing higher order interactions, say, between ρ 0 and ρ 2 , to dampen away, and a unique, primary pathway to emerge.…”

“…succinctly describe radicalization as a sequence of pre-radicalization, self-identification, indoctrination, commitment and jihadization steps; each being marked by an increasing level of fanaticism [12][13][14][15][16][17].…”

Polarization and Segregation through Conformity Pressure and Voluntary Migration: Simulation Analysis of Co-Evolutionary Dynamics

“…Our model also exhibits such an asymmetric matching structure, since city residents are matched with those of different ethnicities while hometown residents are matched only with those of the same ethnicity. 5 Notice that in their choice of parameters, migration even occurs from a payoff-disadvantageous community to a payoff-advantageous community. This assumption of migration may lie somewhere between ours and Kuran and Sandholm [17], as we will see.…”

“…From a comparison of a simulation in two different scenarios of parameter values, they claim that, when the migration process is relatively slower than the action imitation process, it may converge to a polymorphic equilibrium where the majority (not all the agents) of each community takes a different action from the majority of the other community and the two communities coexist. 5 domestic and transnational terrorism in empirical data. Hafez and Mullins [4] summarize socio-psychological causes of homegrown radicalism.…”

“…Hafez and Mullins [4] summarize socio-psychological causes of homegrown radicalism. The research note by international political scientists Klausen et al [5] provides a behavioral framework to assess the risk of homegrown terrorists and analyzes 68 cases. 3 See Bisin and Verdier [14] for survey and summary of their papers.…”