“…used not only in environmental (Hoyos, 2010;Mariel et al, 2013;Taylor and Longo, 2010), and energy economics (Abdullah and Mariel, 2010;Boeri and Longo, 2017;Longo et al, 2008), but also in the fields of health (Ryan et al, 2007;Boeri et al, 2013;Grisolia et al, 2013Grisolia et al, , 2018Morgan et al, 2017;Veldwijk et al, 2017), transportation (Bahamonde-Birke et al, 2017;Higgins, Mohamed and Ferguson, 2017), and marketing (Farsky et al, 2017;Mahadevan and Chang, 2017), among others. Participants have to choose one hypothetical alternative, among various, which describe different scenarios, each composed of the same attributes, but differ in levels.…”