Reflections on Supply Skepticism Revisited and the deeper infrastructure of housing delivery.

The CfOC was excited to read a recent essay by NYU's Vicki Been, Ingrid Gould Ellen, and Katherine O’Regan, Supply Skepticism Revisited, which offers a careful and timely contribution to one of the most important public debates in housing today: is there evidence that adding new housing supply actually improve affordability?

Their answer is “Yes!” 

Drawing on a growing body of empirical research, Been (et al.) argue that new housing supply generally lowers rents, or slows rent growth, at the regional level. In many cases, the data shows that it lowers nearby rents as well. They also review evidence suggesting that new housing does not clearly increase displacement in the ways many opponents fear, and they give serious attention to the “moving chains” through which new units free older units across the market. The paper is measured, empirical, and disciplined. It does not pretend that market-rate supply alone can solve housing need, especially for the lowest-income households. It insists that supply constraints are real, and that expanding housing production remains an essential part of any credible affordability agenda.

We admire the essay for exactly those reasons. It clarifies distinctions that are often blurred in public discussion. And it helps reestablish a point that should never have become controversial: if a society wants housing to become less scarce, it must make it possible to produce more housing.

At the Center for Offsite Construction, we find substantial common ground in that argument. But we also see an opportunity to extend it.

Because if this essay asks whether more supply improves affordability, our own work begins one layer deeper. We ask: what kind of industry architecture is required to make abundant supply possible in the first place?

The housing conversation often gets trapped between two incomplete positions. On one side are those who say affordability is mainly a distribution problem, and that new supply cannot meaningfully help. On the other are those who say the answer is simply to permit more housing and let the market respond. The Been, Ellen, and O’Regan essay is valuable in part because it strengthens the second side of that debate with better evidence and greater nuance. But even that stronger position leaves a large question unresolved. If more supply is so important, why is it still so difficult to produce?

Why do entitled projects stall? Why do cost escalations erode feasibility? Why do local approvals, bespoke detailing, fragmented trades, uncertain procurement pathways, and mismatched contracts repeatedly slow or defeat housing delivery? Why, even when zoning opens, does production so often lag?

To be clear, we have no objections to the Supply Skepticism Revisited essay. These are our next questions, that follow from Been (et al.)'s work.

Their essay is fundamentally about the effects of supply. It examines whether new housing changes rents, neighborhoods, and household outcomes. It operates, appropriately, in the language of urban economics and housing policy. Its key variables are production, price, movement, and displacement.

The FoD&D platform, by contrast, is concerned with the operating system beneath those outcomes. We are grateful these colleagues are helping funding sources focus on why supply matters… so we can focus on what makes supply structurally difficult to deliver at speed, at scale, and with repeatability across many firms. In our work, the binding constraints are not only land use restrictions or neighborhood politics. We address the missing standards, legal agreements, product rules, interface conventions, and digital coordination tools that would allow housing to be produced inside neighborhood politics.

We agree with Supply Skepticism Revisited that housing affordability cannot be addressed without increasing output. We also agree that the debate is often distorted by anecdote, intuition, and the conflation of distinct concepts. A neighborhood becoming more affluent is not automatically the same thing as displacement. New market-rate housing does not deserve to be treated as though it were self-evidently harmful. And the broader system effects of new housing matter more than any one project’s optics.

But the CfOC’s work is not mainly an argument for “more supply” in the abstract. It is an argument that the United States lacks the industrial and institutional conditions required for supply to scale reliably.

From that perspective, the supply debate needs an additional category.

• The question is not only: should we allow more housing?
• It is also: what kind of production environment turns permission into delivery?

Here's to an appreciation of the complexity we face. The housing shortage is a symptom of systemic supply-side gridlock. It is a shortage of production infrastructure that plays out as increased rents, sky-high sale prices, zoning conflicts, and oversized granting needs. For that reason, we are grateful for essays like Supply Skepticism Revisited. They sharpen the economic case for increasing housing production. Our own task is to help imagine, and help build, the industry architecture that can finally make that production easier to achieve.