Sinning, Mathias; Zhang, Yinjunjie - 2021
) and non-deterrence (social norms) letters that aim to improve the collection of traffic and parking fines. We discuss … enforcement letter is stronger than that of the social norms letter. Our analysis of heterogenous treatment effects indicates that … addressing social norms does not change the behavior of young offenders, those who committed a speeding offence, those with a …