But this tendency can be mitigated, if civil society recognizes the importance of preserving lower-income housing. Many of the calls to resist further construction, residents must understand, are being made by special interests; indeed, they amount to a kind of rent seeking by homeowners seeking to boost their own homes’ resale value. In his recent book The New Urban Crisis, the University of Toronto’s Richard Florida decries this phenomenon, comparing opponents of housing construction to the early-nineteenth-century Luddites, who smashed the mechanical looms that were taking their weaving jobs.
In some cases, a city may be on its way to becoming a “great city,” and market forces should be allowed to drive out lower-income people who can’t participate fully in this greatness to make way for those who can. But, more often, a city with a high housing-price-to-income ratio is less a “great city” than a supply-constrained one lacking in empathy, humanitarian impulse, and, increasingly, diversity. And that creates fertile ground for dangerous animosities.
Robert J. Shiller, a 2013 Nobel laureate in economics, is professor of economics at Yale University and the co-creator of the Case-Shiller Index of US house prices. He is the author of "Irrational Exuberance," the third edition of which was published in January 2015, and, most recently, "Phishing for Phools: The Economics of Manipulation and Deception," co-authored with George Akerlof.