“…10 In this current paper, we attempt to contribute to the existing literature on tax evasion by experimentally investigating the effectiveness of whistleblower programs. 11 While some experiments have been conducted to test the effectiveness of whistleblower programs in different contexts such as illegal cartel formation (Apesteguia et al, 2007;Bigoni et al, 2012) 12 , employee-employer relationships (Carpenter et al, 2017;Bartuli et al, 2016) 13 , cheating or lying games (Reuben and Stephenson, 2013;Schmolke and Utikal, 2016;10 According to the daily newspaper Kathimerini, the number of tax informers is booming in Greece, with a fourfold increase in reports of suspected fraud to the financial police in 2010 amid the serious economic crisis. The anti-fraud brigade, the SDOE, received 18 500 reports in 2010, as against 4,500 the previous year and 4000 in 2008.…”