“…Part C of the questionnaire is labelled 'background information'. The questions include social and cultural values (Lin & Lin, 2006;Maddux et al, 2010), educational level/experience (Bao & Gong, 2016;Plott & Zeiler, 2005;List, 2003;2004), income effect (He & Asami, 2014) and gender (Dommer & Swaminathan, 2012). All information obtained from this part is used as control variables in the subsequent analysis.…”