Trust behind bars: a longitudinal study of inmates’ prosocial preferences

Risultato della ricerca: Working paper


The paper presents the results of a Longitudinal Lab-in-the-Field Experiment implemented between September 2015 and July 2016 in two State Prisons in California (USA). A subset of eligible inmates willing to undertake GRIP (Guiding Rage Into Power), an “offender accountability program”, were randomly assigned to it. The paper tests whether the participation to this program (used as a treatment in the experiments), based on building strong relationships and mutual help, affects prosocial preferences of participants, with specific reference to trust. The results of a Difference-in-Differences (DID) estimation procedure show that trust significantly increased in GRIP participants compared to the control group. This result is robust to alternative estimation techniques and to the inclusion of an endogenous behavioral measure of altruism.
Lingua originaleEnglish
Numero di pagine45
Stato di pubblicazionePubblicato - 2017


  • Lab-in-the-Field Experiment
  • Longitudinal Study
  • Trust
  • prisons
  • trust game


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