The prisoner’s dilemma for prisoners and Mafia men

We develop experimental evidence on cooperation and response to sanctions by running prisoner’s dilemma and third party punishment games on three different pools of subjects; students, ordinary criminals and Camorristi (Neapolitan ‘Mafiosi’). The latter two groups were recruited from within prisons. Camorra prisoners show a high degree of cooperativeness and a strong tendency to punish defectors, as well as a clear rejection of the imposition of external rules even at significant cost to themselves. The subsequent econometric analysis further enriches our understanding demonstrating inter alia that individuals’ locus of control and reciprocity are associated with quite different and opposing behaviours amongst different participant types; a strong sense of self-determination and reciprocity both imply a higher propensity to punish for Camorra inmates, but quite the opposite for ordinary criminals, further reinforcing the contrast between the behaviour of ordinary criminals and the strong internal mores of Camorra clans.

Here is the paper by Annamarie Nese, et.al., via Ethan Mollick and Ilya Novak.