Evaluating a Rent Stabilization Proposal
A city of 400,000 has seen median rent rise 41% in five years while median renter income rose 12%. The rental vacancy rate is 3.8%, down from 6.1% five years earlier. The city council proposes capping annual rent increases at 3% for buildings with more than four units, exempting new construction for 15 years. Developers say the cap will halt construction; tenant groups say displacement is already occurring. The council has one meeting to decide and has commissioned a one-page economic analysis.
1. Predict the short-run and long-run effects of the cap using supply, demand, and elasticity.
Read the worked answer
In the short run, rental housing supply is highly inelastic - buildings exist and cannot be unbuilt quickly - so a binding cap transfers surplus from landlords to sitting tenants. That is the visible effect, and it is real: tenants who remain are better off.
But the adjustment happens through channels other than price. With a 3.8% vacancy rate, landlords facing a capped price have reason to reduce maintenance, convert units to condominiums, take units off the rental market, or screen tenants more heavily. Queues and non-price rationing appear.
In the long run, supply is far more elastic. If developers expect capped returns, construction slows, and the exemption for new construction is an explicit acknowledgment of this - it is designed to keep the elastic margin outside the cap. Whether the exemption works depends on whether 15 years is long enough relative to developers' payback horizons.
2. Who actually bears the burden of the policy, and how does elasticity determine that?
Read the worked answer
Not simply "landlords." Incidence depends on relative elasticities. Landlords of existing buildings in a tight market have few alternatives, so they absorb much of the short-run cost - but they can shift costs by deferring maintenance, which tenants experience as declining quality.
The larger effects fall on people who are not yet tenants. If construction slows, the renters who would have occupied units never built are worse off, and those are often lower-income households filtering into older housing. Reductions in maintenance also fall on the poorest renters, who occupy the oldest stock.
So the honest incidence statement is: sitting tenants in covered units gain in the short run; future renters and tenants in the uncontrolled or undermaintained stock lose. Whether the net is positive is an empirical question, not a deduction from the price ceiling alone.
3. What evidence would test the developers' claim that construction will halt?
Read the worked answer
Compare permitting and completions across jurisdictions with and without caps, and look specifically at whether new-construction exemptions were in place. If cities with exemptions show little change in permits while cities without them show declines, the exemption is doing the work and the blanket claim is too strong.
Also examine the cost structure. Construction responds to land costs, financing, labor, and materials as much as to expected rents; if land and financing dominate, a 3% cap on rents may move permits less than developers assert. And check the counterfactual - permits may already be falling for reasons unrelated to the ordinance.
The council should also ask what the vacancy rate does after adoption. A cap that coincides with a further fall in vacancy is a warning sign; a stable or rising rate with steady permitting suggests the policy is not choking supply.