[6] There have been other experiments done with humans to test the validity of the inequity aversion theory proposed by Brosnan and de Waal.
An experiment performed by Urs Fischbacher, Christina M. Fong, and Ernst Fehr called "Fairness, Errors, and the Power of Competition"[7] consisted of a multi-lateral ultimatum game where one contestant was put up against multiple ones.
As a result, the concept of inequity aversion is followed, which says that the responders' willingness to reject the reward is lessened as well as the providers' offers.
This was the opposite for the capuchins as they rejected the lower value food (cucumbers) when they could not get the higher value food (grapes) thus increasing the inequality, especially when the capuchins who received the grapes stole the discarded cucumbers, leaving the other monkeys with nothing.
(2) Position in that markets depends heavily on the individual's efforts, abilities, experience, training, or 'human capital.'
(3) There are automatic mechanisms that operate in the marketplace to ensure that imbalances between one's input (human capital) and one's rewards (wages) are corrected in a way to restore balance" (Hurst 231).
This greatly illustrates the social inequity aversion concept when it comes to humans and how it crosses with the neoclassical labor market theory.