CIE A Level Economics 8 Government Microeconomic Intervention Exam Questions

About CIE A Level Economics 8 Government Microeconomic Intervention

Topic 8 is the A Level government microeconomic intervention section of the Cambridge 9708 syllabus. It builds on topic 3 and topic 7 by evaluating policies to correct market failure: indirect taxes and subsidies set to equal external costs or benefits, regulation, pollution permits, extending property rights, information provision, competition policy and behavioural nudges. You also study government failure. The second part looks at equity and redistribution, measuring inequality with the Lorenz curve and Gini coefficient, and policies such as means-tested and universal benefits. The final part covers labour markets: marginal revenue product, wage determination in competitive markets and monopsony, trade unions and minimum wages.

What you need to know

• 8.1 Correcting market failure A tax equal to the marginal external cost moves output to the socially optimal level where MSC = MSB. Other tools: regulation, tradable pollution permits, property rights, nudges and direct provision. Competition policy controls monopoly abuse, mergers and collusion.
• Government failure Intervention can make allocation worse, for example through information gaps in setting taxes, unintended consequences, administrative costs, regulatory capture or political short-termism.
• 8.2 Equity and redistribution The Lorenz curve plots cumulative share of income against cumulative share of population. Gini coefficient = area between the line of equality and the Lorenz curve / total area under the line of equality; 0 is perfect equality and 1 perfect inequality. Distinguish absolute and relative poverty.
• Redistribution policies Progressive taxation, means-tested benefits, universal benefits, minimum wages, negative income tax and state provision. Means testing targets help but can create a poverty trap.
• 8.3 Labour demand Demand for labour is derived. MRP = marginal physical product x marginal revenue; firms hire where MRP = wage. Elasticity of labour demand depends on the share of labour costs, substitutability with capital and PED for the product.
• Labour supply and wages Supply depends on wages, net advantages, training and mobility. Wage differentials arise from skill, demand, unions and discrimination. A monopsonist employs fewer workers at a lower wage; a minimum wage in monopsony can raise both wages and employment. Know transfer earnings and economic rent.

Common mistakes in 8 Government Microeconomic Intervention

• Saying the tax should equal the whole external cost of the industry. To reach the social optimum it should equal the marginal external cost at the optimal output.
• Describing the Gini coefficient as a measure of poverty. It measures inequality in distribution, not the level of income.
• Claiming a minimum wage always causes unemployment. In a competitive market set above equilibrium it can, but in monopsony it may raise employment.
• Confusing marginal physical product with MRP. MRP multiplies the extra output from one more worker by the marginal revenue from selling it.
• Forgetting government failure in evaluation. Strong answers ask whether the policy might create new inefficiencies.

Try three 8 Government Microeconomic Intervention exam-style questions