We move forward in identifying the causes of the marked and systematic reduction in the homicide rate in São Paulo state in the 2000s. Its main objective was that of investigating the role of the criminal organization PCC in this process. We constructed a first-difference fixed effects model...

In this article we develop a theoretical model to explain the homicide rate in any given place and construct a Bayesian model with a spatial structure to test the hypotheses. We assume that in his quest for self-fulfilment the individual, when taking the decision to perpetrate violence, not only...