The neo-classical economic argument against anti-discrimination laws makes the following errors:
First, the argument assumes rational decision-making.
Neo-classical economics has come under fire from the behavioral economics school for assuming that people always act rationally even though we know differently. To an economist, rational means that if you had the choice between something that gave you two points on the happiness scale and one point on the happiness scale, you will always choose the thing that makes you happier. Notably, more happiness, i.e., utility, does not always have to mean more stuff. If you had the choice between two pieces of cheesecake and one piece of cheesecake, you might choose to only have one piece because you are more concerned about fat, calories, and cholesterol than any immediate gratification you might get from the awesomeness that is cheesecake.
Even assuming that a given discriminatory hiring practice causes a proportional drop in productivity and, therefore, revenue, for the free market argument to work, we need a rational business owner to prefer revenue to discrimination. This has two problems, which cause even more problems!
First, the revenue drop must be sufficiently significant to cause an employer to change his behavior, and second, the loss of utility (or, happiness) caused by the loss of revenue must be higher than the utility the employer gains by discriminating. I address the first below in point 2; the latter point once again assumes that an employer would act rationally when comparing utilities and ignores the special animus that one might hold toward a victimized group. That is, what if hate overpowers money? Let's say my business, Super Straight, Inc., wants to make more Very Straight Widgets, so I need to hire more people. Even though Les B. Ian can make one thousand VSWs per day, causing a 100 jump in my revenue, I would be 200 points angrier just knowing that Ms. Ian is around. A rational actor would still discriminate. But, even if the change in utilities were equal, or even reversed, a rational model assumes fungibility where some people might value their adherence to bigotry stronger than any increase in mere money.
Therefore, we can see that only certain rational actors would respond to the free market and employers that do not act rationally may never respond to it.
Second, the argument assumes that the quantity of potential gay employees can influence employer behavior.
Gay, lesbian, and bisexual employees are, on average, just as productive as their heterosexual counterparts. But, there are a lot fewer of them. This means that even assuming the veracity of the rational behavior model discussed above, discriminating against such a small minority may not have the kind of negative economic effects that would drive a discriminator to change his behavior or close up shop. In fact, in order to push a discriminator into economic ruin (or, even, a statistically significant loss of revenue or market share), the group victimized by discrimination must be large enough to have its best and brightest, a small subset, have enough of an impact. If you discriminate against women, you exclude 50 percent of your applicant pool; if you discriminate against African-Americans or Latinos, you exclude roughly 13 and 17 percent of your applicant pool, respectively. But, gays make up only about 1.7 percent of the US population. Discriminating against the 2 percent of Americans that are natural red heads is more likely to negatively impact your business than discriminating against gays.
The free market forces incentivizing nondiscrimination, therefore, do not exist with respect to small minority populations. So, even assuming the truth of the economic premise, the market fails when it comes to gays. That is the exact moment when the law should step in.
Third, the economic argument ignores the cultural and expressive power of the law. Arguing that many large, competitive companies already ban discrimination on the basis of sexual orientation is evidence that market forces are already working to end anti-gay hiring practices is a little like saying a beautiful flower is evidence of God. It is certainly possible, but there is no evidence of causation: the mere fact that American Express does not discriminate may be evidence of its economic response to an economic reality, but we know nothing more conclusive than that.
In fact, the free market hypothesis discounting the need for anti-discrimination laws ignores the cultural and expressive impact of non-discrimination laws. Before discrimination against women was taboo or before discrimination against African-Americans was taboo, it may not have occurred to businesses that women and blacks could offer them competitive advantages. That is, again even assuming the truth of the economic theory, if the zeitgeist of the time accepts discrimination, the first step toward non-discrimination may only happen at the whim of a pioneering iconoclast. Equality should not be left up to such luck.
Most laws have an expressive angle. Some are simple: a law banning murder expresses society's view that your rights to do what you want end at someone else. Some are more subtle: a progressive tax regime shows that society is interested in equality and fairness.
Employment non-discrimination laws are not exclusively about ending the trappings of insidious bias in the workplace; they also enshrine a progressive society's commitment that members of minority groups are not second-class citizens. They help change the mind of society as a whole about the value and rights of those that are different. Sure, true reform may take a generation or more; but, non-discrimination laws create a background of fairness, equality, and respect in which we raise our future business owners, future workers, and future policy makers. This long run cultural impact may qualify as what economists call "social welfare," but it is absent from the free market theory in employment discrimination.
Ari Ezra Waldman is a 2002 graduate of Harvard College and a 2005 graduate of Harvard Law School. After practicing in New York for five years and clerking at a federal appellate court in Washington, D.C., Ari is now on the faculty at California Western School of Law in San Diego, California. His research focuses on gay rights and the First Amendment. Ari will be writing weekly posts on law and various LGBT issues.
Follow Ari on Twitter at @ariezrawaldman.