To explain these puzzling results, several researchers began to move beyond standard game theoretic assumptions and appeal to a justice motive. With offerers, this could be a desire to be fair in allocating goods, together with a belief that the fair allocation in the game is an equal split. With responders, it could be a desire to not be treated unfairly. This could lead to different explanations of rejection behavior, such as a desire to not participate in unfair deals or a desire to punish someone who is behaving unfairly (Kahneman et al.  1986: S290, see also Forsythe et al. 1994; Güth et al. 1982; Güth 1995; Camerer and Thaler 1995). 