Labour Immobility as a Source of Market Failure, and Whether It Is the Main Reason for Government Intervention

Answer

Part (a)

Labour immobility arises when workers cannot or will not move between jobs — occupationally (lacking the skills the new job needs) or geographically (unable or unwilling to relocate). Market failure is a situation in which society’s welfare is not maximised through economic inefficiency.

How it causes market failure. Technological change makes some jobs obsolete — production workers displaced by automation may be occupationally immobile, lacking the skills for expanding sectors such as banking, or unwilling to take lower-paid jobs. In large economies, retrenched workers in depressed regions may be geographically immobile, deterred by poor transport links or high housing costs in booming areas. While these workers remain unemployed, the economy produces less than it could: it operates inside its production possibility curve, with resources under-utilised.

Moving from A inside the curve to a point B on it would raise output of both goods, raising income, consumption and material living standards. The under-utilisation caused by labour immobility — productive inefficiency — is therefore a market failure because society’s welfare is not maximised.

How it may worsen. Labour immobility worsens when the underlying frictions intensify. Occupational immobility worsens if unemployment benefits are raised, since this lets the unemployed maintain living standards while searching, weakening the incentive to reskill or accept lower-paid work. Geographical immobility worsens if public-transport investment lags, so breakdowns and overcrowding make distant jobs less attractive to commute to. (Note: globalisation or automation merely cause structural change; what worsens immobility is an intensification of the barriers to switching jobs — e.g. automation spreading to more industries, an ageing workforce, or rising housing costs where jobs are.)

Part (b)

Labour immobility is one of several sources of market failure justifying government intervention; the question is whether it is the main one. The thesis is that it is not: public goods are the most serious source because they cause total market failure, and positive externalities arguably warrant stronger intervention than immobility, whose welfare loss is more self-correcting.

Intervention for labour immobility. The government can reduce immobility by funding retraining and skills upgrading (occupational) and improving transport infrastructure (geographical), moving the economy towards its PPC.

Intervention for public goods. A public good is non-excludable and non-rival. Non-excludability lets consumers free-ride, so no producer can charge a price and the good is not produced at all — total market failure. Non-rivalry means the marginal cost of an extra user is zero, so welfare is maximised only if the good is free, which no private firm will do. National defence is the example: deterrence, once provided, protects all residents regardless of payment and does not diminish as population rises. Only government provision, funded by taxation, can supply it.

Intervention for positive externalities. A good generating positive externalities — sports facilities raising fitness and so workforce productivity — has marginal social benefit above marginal private benefit, so the free market under-consumes at $Q_m$ (where $MPB = MPC$) relative to the social optimum $Q_s$ (where $MSB = MSC$), generating a deadweight loss.

A subsidy equal to the external benefit at $Q_s$ raises consumption to the efficient level. (A further source is asymmetric information: in health insurance, adverse selection can shrink the market to a missing market and moral hazard inflates costs — correctable by mandatory insurance and co-payment, though free-market screening and claim limits lessen the failure.)

Judgement. Labour immobility is not the main reason for government intervention. The decisive criterion is the extent and persistence of the market failure. Labour immobility’s welfare loss, though real, is partly self-correcting — the structurally unemployed eventually deplete savings and accept lower-paid work, so the problem is as much political (lost votes during a painful adjustment) as economic. Positive externalities, by contrast, cause a large and persistent under-consumption loss that does not self-correct without intervention, so their economic justification is stronger. But the most serious source is public goods: without state provision of defence and law and order there is total market failure, producing an unstable environment that cripples investment and production. Since the magnitude of the failure is greatest for public goods — total rather than partial — they, not labour immobility, must be the main reason for government intervention in markets.