“…Firstly, they concern economic experiments conducted in virtual reality environments and, secondly, tests in which participants are rewarded with monetary incentives. These criteria exclude online experiments, in which subjects are recruited on the Internet to participate in standard economic experiments (Anderhub et al 2001, Eckel and Wilson 2006, Charness et al 2007 and researches using virtual world as a venue for conventional field experiments (Nicklish and Salz 2008, Bloomfield 2009, Castronova et al 2009, Fiedler 2011, De Sousa and Munro 2012.…”