“…The effects of sanctions and detection probabilities on collusion have been studied by Bigoni et al (2012), Bigoni et al (2015), Chowdhury et al (2018), Chowdhury et al (2020) and Fonseca et al (2022). Bigoni et al (2012) demonstrate that fines have a significant deterrent effect, but also have a pro-collusive effect because the presence of sanctions schemes is associated with an increase in cartel prices.…”