“…Another group of studies has concentrated on cognitive aspects of decision making and behavioural motivations of retail investors faced with 'qualitative information' such as selected environmental and social issues connected with the operations of investments (see Anand and Cowton, 1993;Goyen, 1998a, 1998b;Belkaoui, 1980;Haigh, 2007;Irvine, 1987;Lewis, 2001;Lewis and Cullis, 1990;Lewis and Mackenzie, 2000;Lewis et al, 1998;Mackenzie, unpublished Ph.D. thesis;Mackenzie and Lewis, 1999;Milne and Chan, 1999;Rikhardsson and Holm, 2006;Rivoli, 1995;Webley et al, 2001;Winnett and Lewis, 2000). Generally, this body of work, much of it consisting of experimental studies of actual and hypothetical investors, would lend support to the behavioural strand in institutional fi nance, challenging the mean-variance theorem of neoclassical economics (also see Statman, 1999;Thaler, 1980Thaler, , 1999Thaler, , 2000.…”