Thorstein Veblen, Joan Robinson, and George Stigler (probably) never met : social preferences, monopsony, and government intervention

Wages and employment are too low in a monopsony. Furthermore, a minimum wage or a subsidy may raise employment up to its first-best level. First, we analyze whether these important predictions still hold if workers compare their income to that of a refer- ence group. Second, we show that the undistorted, competitive outcome may no longer constitute the benchmark for welfare comparisons. Third, we derive a condition which guarantees that the monopsony distortion is exactly balanced by the impact of social comparisons. Finally, we show how wage restrictions and subsidies or taxes can be used to ensure this condition both for a welfarist and a paternalistic welfare objective.