A worker’s utility may increase in his own income, but envy can make his utility decline with his employer’s income … various assumptions about the object and generality of envy. Envy amplifies the effect of incentives on effort and, therefore …, increases optimal incentive pay. Moreover, envy can make profitsharing optimal, even when the worker’s effort is fully …

cross-racial envy, which on aggregate may lead to substantial underinvestment in the economy …