3.2 Methods and effects of government intervention in markets

An indirect tax creates a wedge between the price paid by consumers and the price received by producers. Incidence is the share of the burden borne by each side, determined largely by relative elasticities.

The less elastic side has fewer alternatives and tends to bear more of the tax through a larger price change or lower net receipt. The legal payer need not bear most of the economic burden.

A tax on a product with inelastic demand may raise the consumer price substantially; with elastic demand, producers may absorb more through a lower received price.

“The firm pays the tax” describes collection, not necessarily final incidence.

A subsidy is a payment to producers or consumers that lowers the effective cost of supplying or buying a good. It shifts supply or demand and creates a gap between the market price and the net price received or paid.

The benefit is shared according to relative elasticities, while government expenditure is funded from scarce resources. A subsidy can increase output but may create overproduction or fiscal cost.

A per-unit subsidy for public transport can lower the fare and raise passenger numbers; the operator receives the fare plus the subsidy.

A subsidy is not automatically received entirely by producers or consumers; incidence depends on market responsiveness.

Direct provision means the government supplies a good or service itself, often using tax revenue or public agencies, rather than relying only on private purchases.

It can address public-good free riding, merit-good under-consumption or equity goals, but provision still has opportunity costs and may involve waiting, rationing or inefficiency.

A state may provide vaccination clinics or flood defence directly so access does not depend entirely on individual willingness or ability to pay.

Public provision does not mean unlimited supply or zero economic cost; inputs remain scarce.

A maximum price below equilibrium is a binding ceiling that can create a shortage; a minimum price above equilibrium is a binding floor that can create a surplus.

If the legal bound does not cross equilibrium it is non-binding. Once binding, allocation may occur through queues, rationing, unsold stocks, government purchases or black markets.

A binding rent ceiling may increase demand for apartments while reducing supply; an agricultural floor may leave the government buying excess output.

Do not label a price control binding without comparing it with equilibrium, and do not assume the legal price alone determines who receives the good.

A buffer stock scheme sets a target price or price band. An agency buys surplus when market price falls below the target and sells stock when price rises above it.

The scheme requires storage, finance and a credible target. It can stabilise producer income but risks unsold spoilage, high costs or running out of stock if the target is unrealistic.

To support a crop price, the agency buys harvest surpluses in a bumper year and releases stored grain after a poor harvest.

Buying surplus does not make it disappear economically; storage and disposal costs remain.

Information provision gives consumers or producers evidence about quality, risks, benefits or costs so choices better reflect true private and social consequences.

It may involve labels, warnings, public campaigns, testing standards or disclosure rules. Effectiveness depends on credibility, comprehension, attention and whether behaviour is habit-forming.

Nutrition labels can help consumers compare products; clear vaccine information may raise uptake when uncertainty, not price, is the main barrier.

Providing information does not guarantee rational behaviour or remove all market failure; it changes information, not income or preferences.