Price Floor
A price floor is a minimum price set by government or another authority below which a good, service, or factor cannot be sold. Price floors are a form of price control and are used to support the incomes of producers, to protect workers, or to achieve other objectives. When set above the equilibrium price, a floor creates a surplus, because the quantity supplied exceeds the quantity demanded. The resulting surplus must be managed through purchases, quotas, or other measures.
Mechanism
When a price floor is set above the equilibrium price, the market cannot clear. Quantity supplied exceeds quantity demanded, creating a surplus. Producers who can sell at the floor price receive more than they would in an unregulated market, but some producers are unable to sell their output at all. Consumers pay a higher price and purchase less, losing consumer surplus, and some are unable to obtain the good.
The surplus created by a price floor must be dealt with. In agricultural markets, governments may purchase the surplus and store it, dispose of it, or export it with subsidies, all of which involve fiscal costs. Alternatively, governments may restrict production through quotas to prevent the surplus from arising. The choice of mechanism affects the cost and the distributional consequences of the policy.
Examples
The most familiar examples are agricultural price supports and minimum wages. Agricultural supports, such as guaranteed minimum prices for crops, raise farm incomes but generate surpluses that must be managed. Minimum wages set a floor on the price of labour; if set above the market-clearing wage, they may create unemployment, though the effect depends on the competitiveness of the labour market. In monopsonistic labour markets, a minimum wage can raise both wages and employment.
Price floors also appear in other contexts. Rent controls, where they set minimum rents for landlords, are a form of price floor, though they are more commonly discussed as price ceilings on tenants. Minimum prices for alcohol or tobacco are used to discourage consumption and to limit below-cost selling. Resale price maintenance, in which manufacturers set minimum retail prices, has similar effects.
Welfare effects
Price floors generate deadweight loss. The reduction in quantity traded below the efficient level eliminates mutually beneficial transactions. The surplus, if it is destroyed or purchased at a cost, adds to the social loss. The transfer from consumers to producers is a redistribution rather than a net loss, but the efficiency cost is borne by society as a whole.
The distributional effects depend on who is covered and on the elasticity of supply and demand. Producers with lower costs gain more from a floor, while high-cost producers may be harmed if they cannot sell. Consumers of the affected good lose, and if the good is an input, the cost increases pass through to downstream users. The net welfare effect is usually negative, though the policy may be justified on distributional or other grounds.
Policy considerations
Price floors are used when the objective is to support incomes or to protect vulnerable groups, and when other instruments, such as direct transfers, are unavailable or politically infeasible. Economists often prefer direct transfers over price floors, because transfers can achieve distributional objectives without distorting prices and quantities, and because they are more transparent in their fiscal cost and more precisely targeted.
In practice, price floors are often combined with other measures. Agricultural policies may combine price supports with quotas, set-asides, and direct payments. Minimum wages may be combined with tax credits and training programmes to offset potential employment effects. The design of these packages determines the overall cost and effectiveness of the policy.
Minimum wages and employment
The minimum wage is the most studied price floor. In a competitive labour market, a minimum wage set above the equilibrium wage would reduce employment, as firms hire fewer workers. In practice, the employment effects have been found to be small or, in some studies, positive, particularly for modest increases. Explanations include monopsony power in labour markets, which allows a minimum wage to raise both wages and employment, and efficiency wage considerations.
The evidence on minimum wages has evolved, with recent studies using natural experiments and administrative data finding limited disemployment effects in many settings. The effects depend on the level of the minimum wage relative to the median, the characteristics of the labour market, and the time horizon. Very high minimum wages relative to productivity are likely to reduce employment, particularly for low-skilled workers.
Agricultural support
Agricultural price floors have been used extensively to support farm incomes. They typically involve guaranteed minimum prices, accompanied by government purchases of surplus production, production quotas, or direct payments. These programmes raise incomes for participating farmers but impose costs on consumers and taxpayers, distort production and trade, and can harm farmers in developing countries by depressing world prices.
Reforms in many countries have shifted support from price floors toward direct payments decoupled from production, which are less distorting. International trade rules discipline agricultural support, and negotiations continue over the appropriate limits and forms of assistance. The experience illustrates the difficulties of supporting incomes without distorting production.
Design considerations
The design of a price floor determines its effects. The level relative to the equilibrium price, the coverage of products or workers, the duration, and the accompanying measures all matter. A floor with a narrow coverage and a modest level has smaller distortions, while a broad and high floor causes larger surpluses and requires more costly complementary measures.
Alternative instruments, such as direct transfers, tax credits, and public investment, can achieve income support objectives with lower efficiency costs. The choice among instruments depends on the objectives, the fiscal cost, and the distributional consequences. Economists generally favour instruments that address the underlying problem directly, such as income support for low-income households, over interventions that distort prices and quantities.