Kahneman, D., Knetsch, J. L., &Thaler, R. (1986). Fairness as a constraint on profit seeking: Entitlements in the market. The American economic review,728-741.

  Community standards of fairness for the setting of prices and wages were elicited by telephone surveys. In customer or labor markets, it is acceptable for a firm to raise prices (or cut wages) when profits are threatened and to maintain prices when costs diminish. It is unfair to exploit shifts in demand by raising …