Theodoros Rapanos, Marc Sommer, Yves Zenou, 06 February 2020

Information and social norms matter in people’s decisions whether to commit crimes. Strategic interactions in networks influence the gap between the actual and perceived risks and costs of being caught. The column sets out a game framework in which the expectations of potential criminals are influenced by their peers. Surprisingly, severing these information links – even between relatively active offenders – does not necessarily lead to a decrease in the aggregate level of crime.

Michal Bauer, Jana Cahlíková, Dagmara Celik Katreniak, Julie Chytilová, Lubomír Cingl, Tomáš Želinský, 05 January 2019

The economic consensus is that groups behave in a more self-regarding way than individuals, which affects their members’ decision-making. This column describes new evidence from experiments in Slovakia and Uganda that supports an alternative hypothesis from social psychology that simply being a member of a group makes us more anti-social to outsiders. Within-group cohesion in organisations may also have a dark side, fostering hostility to outsiders.

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