Well, like nature vs. nurture, or whether to get the sweet brunch or the savory, it's a debate that will never be fully resolved. (Go with savory, unless you're, like, 12 years old.) But new evidence does sometimes come in.
Like those those polls of economists that the University of Chicago business school does; has everybody seen those? For those of us who've been debating this question, these things are a gold mine.
The latest question, on rent control, has Peter Dorman rightly exercised. As he points out, the question -- whether rent regulations have had "a positive impact over the past three decades on the amount and quality of broadly affordable rental housing in cities that have used them" -- omits the genuine goal of rent regulation, neighborhood stabilization:
The most compelling argument for rent control is neighborhood stabilization, the idea that social capital in an urban environment requires stable residence patterns. If prices are volatile, and this leads to a lot of residential turnover, the result can be a less desirable neighborhood for everyone. ... not a single textbook treatment of rent control mentions stabilization as an objective, even though this is a standard element in the real-world rhetoric surrounding this issue.I would just add that a diversity of income levels in a neighborhood is also a goal of rent regulation, as is recognizing the legitimate interest of long-time tenants in staying in their homes. (Not all rights are property rights!) So by framing the question purely in terms of the housing supply, the Booth people have already disconnected it from actual policy debates in a way favorable to orthodoxy. Anyway, no surprise, orthodoxy wins, with only a single respondent favoring rent regulation. (And I think that one might be a typo.) My favorite answer is the person who said, " Rent control will have similar effects to any price control." That's the beauty of economics, isn't it? -- all markets are exactly the same.
Some of the other ones are even better. Check out the one on education, which asks if all money currently being spent on K-12 education should be given out as vouchers instead. (Why not cash?) By a margin of 36 to 19 (or 41 to 23 when the answers are weighted by confidence) the economists vote, Hells yeah, let's abolish the public school system. Presumably they're mostly reasoning along the same lines as Michael Greenstone of MIT: " Competition is likely beneficial on average. Less clear that all students would benefit leading to tough questions about social welfare functions" -- which doesn't stop him from signing up in favor of vouchers. The presumed benefits of competition are dispositive, while distributional questions, while "tough" in principle, can evidently be ignored in practice. On the other hand, props to Nancy Stokely of the U of C (strongly agree, confidence 9 out of 10) for spelling it right out: "It's the only way to break the unions." (Yes, that's what she wrote.) So, hardly definitive, but definitely some ammo for Team Ideologue.
People sometimes say that academic economists just reflect the views of the country at large, or even the more-liberal-than-median views of other academics or educated professionals. And on some issues, that's certainly true. (Booth also gets a solid majority in favor of drug law reform.) But come on. Replacing the public school system with vouchers is a far-right, fringe position in almost any significant demographic -- except, it would seem, professional economists.
Back to rent control. Jodi Beggs enthusiastically endorses the consensus, but her conscience then compels her to add:
Techhhhhnically speaking , if none of the housing in an area was deemed “affordable” before the price ceiling, then the price ceiling could, I suppose, increase the quantity of affordable housing. (In fact, Pinelopi Goldberg specifically points this out.) [True. Goldberg's answers in general are a beacon of sanity.] In most realistic cases, however, the rent control laws are going to make builders think twice about putting up residential properties and make potential landlords think twice about getting into the rental business.It's awfully hard not to read the drawn out adverb as a parapraxis, indicating resistance to the heretical thought that, in fact, economic theory gives no answer to the question of whether rent control laws increase or decrease the supply of affordable housing. More concretely, Begg's "realistic cases" are a figment of her imagination, or rather her ideology; in all actual cases rent control laws, at least in major American cities (there are only a couple) only apply to units built before a certain date. In New York City, for instance, rent regulations DO NOT APPLY to anything built since 1974. Hard to believe that builders are thinking twice about putting up new buildings because of rent stabilization, when it hasn't applied to new buildings in nearly 40 years. But hey, why should you have to actually know something about the policy you're discussing, to walk through the old familiar supply and demand graphs showing why Price Controls Are Bad?
"Nothing dulls the mind," says Feyerabend, "as thoroughly as a sequence of familiar notions."
(I can't resist putting down the quote in full:
Writing... [is] almost like composing a work of art. There is some overall pattern, very vague at first, but sufficiently well defined to provide ... a starting point. Then come the details -- arranging the words in sentences and paragraphs. I choose my words very carefully -- they must sound right, must have the right rhythm, and their meaning must be slightly off-center; nothing dulls the mind as thoroughly as a sequence of familiar notions. Then comes the story. It should be interesting and comprehensible, and it should have some unusual twists. I avoid "systematic" analyses. The elements hang together beautifully, but the argument itself is from outer space, as it were, unless it is connected with the lives and interests of individuals or special groups. Of course, it is already so connected, otherwise it would not be understood, but the connection is concealed, which means that, strictly speaking, a "systematic" analysis is a fraud. So why not avoid the fraud by using stories right away?)