This paper provides a rationale for group support for political violence in situations where violence does not provide a material benefit. Rabin’s (1993) theory of fairness is adopted to demonstrate that although group violence may not be the equilibrium of a material game it may be a fairness...

Experimental evidence has convincingly shown the existence of reciprocal inclinations, i.e., a tendency for people to respond in-kind to hostile or kind actions. Little is known, however, about: (i) the prevalence of reciprocity in the population, (ii) individual determinants of reciprocity,...