This paper studies incentives provision when agents are characterized either by homo moralis preferences, i.e., their utility is represented by a convex combination of selfish preferences and Kantian morality, or by altruism. In a moral hazard in a team setting with two agents whose efforts...

We show experimentally that fairness concerns may have a decisive impact on both the actual and the optimal choice of contracts in a moral hazard context. Explicit incentive contracts that are optimal according to self-interest theory become inferior when some agents value fairness. Conversely,...