Q.Suppose the market determined rent for apartments is too high for common people to afford. If the government comes forward to help those seeking apartments on rent by imposing control on rent, what impact will it have on the market for apartments?

When the government imposes rent control — a price ceiling below the market-clearing rent — it creates a shortage in the apartment market. At the artificially low ceiling rent, quantity demanded rises (more people want apartments because they are cheaper) while quantity supplied falls (landlords find it less profitable to maintain or offer apartments for rent). The gap between the two is the shortage: many who want apartments at the controlled rent cannot find one.

This leads to three main consequences. First, a persistent excess demand emerges, often resulting in long waiting lists or under-the-table payments. Second, landlords may reduce maintenance spending or convert rental units to other uses, worsening the quality and availability of housing over time. Third, the ceiling prevents the price mechanism from allocating apartments efficiently — instead of rent adjusting to clear the market, non-price rationing (favoritism, bribes, or queues) takes over. …

The Economic Logic of Price Ceilings

When the government imposes rent control—a maximum legal price landlords can charge—it intervenes in the market mechanism that would otherwise balance supply and demand. The intention is redistributive: to make housing affordable for low-income households. But the economic consequences ripple through both sides of the market in predictable ways.

At the market-determined equilibrium rent, the number of apartments landlords wish to supply exactly matches the number renters wish to demand. This is the clearing price. A rent ceiling set below this equilibrium disrupts the balance. At the artificially low rent, two things happen simultaneously: more people want to rent apartments (quantity demanded rises), while fewer landlords are willing to supply them (quantity supplied falls). The gap between these quantities is the shortage.

Impact on the Apartment Market

Excess Demand (Shortage)

The most immediate effect is persistent excess demand. At the controlled rent, say $R_c$ (where $R_c < R_e$, the equilibrium rent), the number of apartments demanded $Q_d$ exceeds the number supplied $Q_s$. Unlike a temporary shortage that market prices would eliminate, this one is permanent as long as the ceiling binds. Renters who would gladly pay the controlled rent cannot find apartments.

Rationing and Non-Price Allocation

Since price can no longer allocate the scarce apartments, other mechanisms emerge. Landlords may favor tenants based on personal connections, discrimination, or willingness to pay under-the-table premiums. Long waiting lists develop. The market no longer allocates housing to those who value it most (in monetary terms), but to those with the right connections or patience.

Quality Deterioration

Landlords face reduced rental income but still bear maintenance costs. With profit margins squeezed, the incentive to maintain or improve properties weakens. Over time, the quality of rent-controlled apartments declines—peeling paint, broken fixtures, delayed repairs become common. New construction of rental housing slows or stops, since developers cannot earn competitive returns at the controlled rent.

Black Markets …