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Avoid this Reductio

Excellent arguments – economic and ethical – against minimum-wage legislation are abundant. Yet among these sound arguments is not a frequently used reductio ad absurdum. I do my best, in my most recent AIER column, to explain. A slice:

People who are skeptical of government intervention into markets often respond to calls for hikes in the minimum wage by using a reductio ad absurdum – such as, “Why raise the minimum wage to only $15 per hour? If the minimum wage works as promised, why not instead raise it to $50 per hour, or even to $150?!”

In reaction to this reductio, economists justifiably wince. For two reasons, this reductio is a weak argument against the minimum wage.

Minimum Wages Have Benefits as Well as Costs

When I analyze minimum-wage legislation with my freshman economics students, I always emphasize the fact that the analysis itself cannot determine if such legislation is good or bad. Such a determination is not in the province of science. Economic analysis can reveal only the likely consequences of a minimum wage. Assessing the merits or demerits of these consequences necessarily involves value judgments. And because minimum-wage statutes, like nearly all government interventions, have both upsides and downsides – in popular parlance, they generate some ‘winners’ and some ‘losers’ – value judgments cannot be avoided when considering how to weigh the benefits reaped by the ‘winners’ against the losses imposed on the ‘losers.’ Science cannot tell us the maximum amount, if any, of a loss the ‘losers’ can suffer in order for the policy nevertheless to be justified.

Economic analysis reveals convincingly that a minimum wage very likely reduces the employment options open to low-skilled workers, including stripping some of them of jobs altogether. But this analysis also reveals that a minimum wage results in some other workers being paid wages higher than they’d be paid without a minimum wage. Most people today assess the first consequence as a cost and the second consequence as a benefit. (In passing, it’s worth noting that the employment loss that is today generally regarded as a cost of a minimum wage was not always so regarded. As Princeton University economist Thomas Leonard documents in his 2016 book, Illiberal Reformers, early 20th-century advocates of minimum wages judged unemployment caused by minimum wages to be a feature rather than a bug. These advocates endorsed the minimum wage precisely because they saw it as a means of excluding from the labor pool workers who these advocates regarded as ‘inferior.’)

A minimum wage, therefore, confronts us with a trade-off: reduced employment options (and lower incomes) for some workers, and higher take-home pay for others. Again, science cannot tell us how much, if any, of minimum-wage’s cost is acceptable in light of the corresponding benefits. But science does tell us that the higher the minimum wage, the greater will be its negative impact on employment. And the minimum wage can be set so high that all, or nearly all, of the workers who are meant to be helped by the minimum wage wind up unemployed, with the result being all cost and no benefit.

This reality is the first reason economists wince at the reductio. Many economists support modest hikes in the minimum wage on the grounds that – in these economists’ personal estimations – the negative employment effects, while real, are outweighed by the benefits reaped by those workers who are paid higher wages. (See, for example, economists’ responses to Question B in this 2013 survey conducted by the University of Chicago’s Booth School of Business.) Because the larger the hike in the minimum wage, the larger is the negative impact relative to the positive impact, to support a small hike in the minimum wage on the grounds that the negative impact is outweighed by the positive impact does not logically commit someone to support a larger hike. It’s perfectly consistent for someone to regard as acceptable the negative impact of a minimum-wage hike that’s modest while regarding as unacceptable the negative impact of a minimum-wage hike that’s large.

While there’s no logical inconsistency involved in favoring a minimum wage of, say, $15 per hour while opposing one of $50 per hour, it’s important to realize that when economists make such an assessment they express a value judgment. In doing so they step outside of their role as scientists. They speak simply as fellow human beings. Economists have no more expertise than do non-economists at making value judgments about the acceptability or unacceptability of the trade-offs entailed by any hike in the minimum wage. For example, David Card – who, in part because of his research on minimum wages, is one of the co-recipients of the 2021 Nobel Prize in Economic Science – is no better positioned than are you or your Uncle Vinnie to judge whether the negative effects of a proposed hike in the minimum wage are worth incurring in exchange for the positive effects.

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