Explaining mobilization for revolts by private interests and kinship relations.

Mobilization for revolts poses a significant challenge for rational choice theory because revolts are vulnerable to free-riding, which disincentivizes rational actors from mobilizing. Strong, informal relations such as kinship ties have been identified as factors that can shift the rational calculations of individuals and lead to mobilization for revolts. In social networks that are polarized by the presence of mobilized individuals, such as rebels, and actors opposing the mobilization effort such as the elite, kinship relations have not only a bridging effect but also a diverging one. Building on Tullock's private interest theory, we develop a framework in which kinship relations determine the extent of individual's payoffs and costs of mobilization for revolts against an elite. We posit that distant kin of the elite expect high payoffs of mobilization for revolts and face the lowest costs of mobilization for revolts by virtue of their position in the network of kinship relations. Using a unique, hand-collected dataset that reconstructs a revolt in Basel, Switzerland, in 1691, we test our framework and contribute to a better relational understanding of the mechanisms that lead rational actors to mobilize for revolts. Our analyses show that mobilization for revolts is mainly driven by distant kinship relations to the ruling elite rather than close kinship relations to the rebels.

Unveiling everyday discrimination. Two field experiments on discrimination against religious minorities in day-to-day interactions.

In recent years-particularly since the beginning of the refugee crisis in 2015-the political debate about issues of Islamophobia and resentment of Muslims has gained new momentum. Our research contributes to the growing experimental literature focusing on these phenomena. Unlike most previous empirical investigations, the present study does not examine "large scale" discrimination against Muslim minorities in situations which occur only periodically throughout an individual's life (e.g., on the rental-, labor-, or partner market); rather, it sheds light on (minor) discrimination events that occur on a day-to-day basis. Such "everyday discrimination" has been shown to be particularly detrimental to physical and psychological health. Specifically, our research examines the effect of open displays of religious identification-wearing a Muslim headscarf-on everyday discrimination against female Muslims. We report the results of two natural field experiments in Switzerland designed to examine such forms of day-to-day discrimination. Study 1 focuses on differential sanctioning, whereas study 2 investigates differences regarding helping behavior. We found pronounced discrimination against women wearing a headscarf in two distinctly different types of everyday interactions. In both scenarios, headscarf-wearing confederates were treated less favorably than bare-headed ones: they were sanctioned more often for violating the "stand right, walk left"-norm on escalators and received less help when asking for a favor (borrowing a mobile phone for an urgent call).

Interactive effects of social network centrality and social identification on stress.

The present study aimed to integrate the social identity approach to health and well-being with social network analysis. Previous research on the effects of social network centrality on stress has yielded mixed results. Building on the social identity approach, we argued that these mixed results can be explained, in part, by taking into account the degree to which individuals identify with the social network. We hence hypothesized that the effects of social network centrality on stress are moderated by social identification. Using a full roster method, we assessed the social network of first-year psychology students right after the start of their study programme and three months later. The effects of network centrality (betweenness, closeness, eigenvector centrality) and social identification on stress were examined using structural equation models. As predicted, our results revealed a significant interaction between network centrality and social identification on stress: For weakly or moderately identified students, network centrality was positively related to stress. By contrast, for strongly identified students, network centrality was unrelated to stress. In conclusion, our results point to the perils of being well-connected yet not feeling like one belongs to a group.

The diffusion of scientific innovations: A role typology.

How do scientific innovations spread within and across scientific communities? In this paper, we propose a general account of the diffusion of scientific innovations. This account acknowledges that novel ideas must be elaborated on and conceptually translated before they can be adopted and applied to field-specific problems. We motivate our account by examining an exemplary case of knowledge diffusion, namely, the early spread of theories of rational decision-making. These theories were grounded in a set of novel mathematical tools and concepts that originated in John von Neumann and Oskar Morgenstern's Theory of Games and Economic Behavior (1944/1947) and subsequently spread widely across the social and behavioral sciences. Introducing a network-based diffusion measure, we trace the spread of those tools and concepts into distinct research areas. We furthermore present an analytically tractable typology for classifying publications according to their roles in the diffusion process. The proposed framework allows for a systematic examination of the conditions under which scientific innovations spread within and across preexisting and newly emerging scientific communities.

Peer influence in bullying: The autonomy-enhancing effect of moral competence.

Research has found that moral competence is negatively associated with bullying behavior in schools, but the drivers of this association are not yet well understood. In this paper, we report on two studies which suggest that moral competence acts as a moderator of peer influence in the context of school bullying. Data were collected at two time points in three German higher secondary schools (grades 7-10, average age at measurement: 14.26 years). Using a cross-lagged panel design (CLPD), study 1 (N = 251) found adolescents with low moral competence to be susceptible to peer influence, while no such effect was found for adolescents with high moral competence. Study 2, a cross-sectional analysis (N = 748), found moral competence to be inversely related to the likelihood of an individual's conforming with the pro-bullying behavior of his or her peers. Neither study found corresponding effects for pro-social, defending behavior. Our findings further illuminate the associations between moral competence, peer influence, and school bullying. Some implications for bullying prevention are discussed.