One of the striking features of the US economy is how much concentration we’ve allowed in major industries: national monopolies, regional monopolies (e.g. cable), oligopolies. Now come economists tying that trend to why raising the minimum wage doesn’t cause the job losses that micro-economics might predict: one of the things that makes market concentration profitable is that it allows firms to underpay workers (that is, pay them below their marginal productivity). So long as the raise in minimum wage doesn’t rise to a level exceeding the value of the work, businesses rationally decide to hold on to the workers.
José Azar, Emiliano Huet-Vaughn, Ioana Marinescu, Bledi Taska, and Till von Wachter: Minimum Wage Employment Effects and Labor Market Concentration:
Why is the employment effect of the minimum wage frequently found to be close to zero? Theory tells us that when wages are below marginal productivity, as with monopsony, employers are able to increase wages without laying off workers, but systematic evidence directly supporting this explanation is lacking. In this paper, we provide empirical support for the monopsony explanation by studying a key low-wage retail sector and using data on labor market concentration that covers the entirety of the United States with fine spatial variation at the occupation-level. We find that more concentrated labor markets–where wages are more likely to be below marginal productivity–experience significantly more positive employment effects from the minimum wage. While increases in the minimum wage are found to significantly decrease employment of workers in low concentration markets, minimum wage-induced employment changes become less negative as labor concentration increases, and are even estimated to be positive in the most highly concentrated markets. Our findings provide direct empirical evidence supporting the monopsony model as an explanation for the near-zero minimum wage employment effect documented in prior work. They suggest the aggregate minimum wage employment effects estimated thus far in the literature may mask heterogeneity across different levels of labor market concentration.
Spotted via Brad DeLong.