Endogenous monopsony and the perverse effect of the minimum wage in small firms

The minimum-wage rate has been introduced in many countries as a means of alleviating the poverty of the working poor. This paper shows, however, that an imperfectly enforced minimum-wage rate causes small firms to face an upward-sloping labor supply schedule. Since this turns these firms into endogenous monopsonists, the minimum-wage rate has the perverse effect of reducing employment in small firms as well as what these firms offer their workers. Thus, if there are only small firms, the minimum-wage rate makes all workers that would be employed in the absence of a minimum-wage rate worse off.