“…Examples include populations that differ with respect to occupation (e.g., Cooper, Gu, Kagel and Lo, 1999;Hannah, Kagel and Moser, 2002;Fehr and List, 2004;Carpenter, Burks and Verhoogen, 2005;Güth, Schmidt and Sutter, 2007;Carpenter, Connoly and Meyers, 2008;Andersen, Harrison, Lau and Rutström, 2009;Anderson et al, 2010), age (Harbaugh, Krause, Liday and Vesterlund, 2003), and nationality/cultures (e.g., Roth, Prasnikar, Okuno and Zamir, 1991;Henrich et al, 2001;Herrmann, Thöni and Gächter, 2008;Cameron, Chaudhuri, Erkal and Gangadharan, 2009;Henrich, Heine and Norenzayan, 2010). An implicit assumption made in these studies is that any selection bias is identical across populations.…”