What determines wages and employment in a labour market?
The demand for and supply of labour, wage determination in competitive and imperfect markets, monopsony, trade unions, and the causes of wage differentials.
An Edexcel A-Level Economics A answer to the labour market, covering the derived demand for labour and marginal revenue product, the supply of labour, wage determination in perfectly competitive markets, monopsony employers, the effect of trade unions, and the causes of wage differentials and labour market failure.
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What this dot point is asking
Edexcel wants you to explain the demand for and supply of labour, show how wages are set in competitive and imperfect markets, analyse monopsony and trade unions, and explain wage differentials and labour market failure.
Demand for and supply of labour
The elasticity of labour demand and supply matters: demand is more elastic when labour is a large share of costs and when substitutes (machines) exist; supply is more elastic when training is short and the job is unskilled and easily entered.
Wage determination
Trade unions and wage differentials
A trade union is an organisation that bargains collectively for higher wages and better conditions. In a competitive market a union can raise the wage above equilibrium but at the cost of lower employment (excess supply of labour); in a monopsony market a union can raise both wages and employment by countering the employer's power, much like a minimum wage can.
Wage differentials arise from differences in MRP and skills, the elasticity of labour supply, non-monetary factors (compensating differentials for unpleasant work), labour immobility (geographical and occupational), and discrimination. These causes mean labour markets can fail to allocate workers efficiently or fairly, justifying minimum wages, anti-discrimination law and training subsidies.
Examples in context
- NHS and nurses. A classic monopsony: as the dominant employer of nurses, the NHS has wage-setting power, which a strong union partly offsets.
- National Living Wage. The UK minimum for over-21s rose above an hour with limited measured job losses, supporting the monopsony interpretation.
- Premier League footballers. Very high MRP (huge revenue per star player) explains their wages, a vivid derived-demand and MRP case.
- Automation. As robots substitute for routine labour, the demand for some workers falls, illustrating elasticity and substitution in labour demand.
Try this
Q1. Explain why the demand for labour is described as a derived demand. [3 marks]
- Cue. Labour is demanded not for itself but for the goods it helps produce, so it depends on product demand.
Q2. Explain how a monopsony employer can pay a wage below the competitive level. [4 marks]
- Cue. As the only buyer of labour, it faces the market supply curve and restricts hiring, setting a lower wage and lower employment than a competitive market.
Exam-style practice questions
Practice questions written in the style of Pearson Edexcel exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Edexcel 20194 marksA worker adds 50 units of output a day, each sold at . Calculate the worker's marginal revenue product and state the maximum daily wage a profit-maximising firm would pay.Show worked answer →
A short calculate question on marginal revenue product.
Marginal revenue product per day.
A profit-maximising firm hires up to the point where the wage equals MRP, so it would pay at most a day for this worker.
Markers reward (1) the MRP formula, (2) with units, (3) the rule that the firm hires where wage equals MRP.
Edexcel 202212 marksAssess the likely effects of a significant increase in the national minimum wage on employment and the wider economy.Show worked answer →
A 12 mark question (around 8 KAA, 4 evaluation).
KAA: in a competitive labour market a minimum wage above equilibrium creates excess supply (unemployment), shown on a demand-and-supply diagram; but in a monopsony it can raise both wages and employment by countering employer power. Note effects on incomes, poverty and firms' costs.
Evaluation: the effect depends on the elasticity of labour demand, how far the wage is set above equilibrium, the prevalence of monopsony, and possible productivity or demand gains. Reach a judgement, citing the limited disemployment found in UK studies.
Markers reward both diagrams (competitive and monopsony) and balance.
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Sources & how we know this
- Pearson Edexcel A-Level Economics A (9EC0) specification — Pearson Edexcel (2015)