8.3 Labour Market Forces and Government Intervention

Cambridge International A2 Level Economics — 9708

2026 📋 Syllabus Objectives

By the end of these notes, you should be able to:

  1. Explain demand for labour as a derived demand
  2. Identify factors affecting demand for labour in a firm or an occupation
  3. Explain causes of shifts in and movements along the demand curve for labour
  4. Define and calculate Marginal Revenue Product (MRP), and use it to derive a firm's demand curve for labour
  5. Explain factors affecting the supply of labour to a firm or occupation (wage and non-wage)
  6. Explain causes of shifts in and movements along the supply curve of labour
  7. Explain wage determination in perfect (competitive) labour markets
  8. Explain wage determination in imperfect markets — including the roles of trade unions, government minimum wages, and monopsony employers
  9. Explain how labour market forces determine wage differentials
  10. Define and explain transfer earnings and economic rent

📘 Main Content

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Objective 1 — Demand for Labour as a Derived Demand

What does "derived demand" mean?

In a normal product market, people demand goods because they want to enjoy them directly — for example, you buy a pizza because you want to eat it.

Labour is different. A firm does not hire workers because it enjoys having employees. It hires workers because those workers help produce goods or services that the firm then sells. So the demand for labour comes from — or is derived from — the demand for the product that labour helps to make.

💡 Simple example: If more people want to buy houses, construction companies need more bricklayers and carpenters. The demand for those workers goes up because the demand for houses went up. If house demand falls, fewer workers are needed. The demand for labour is derived from the demand for housing.

Key point: If demand for the final good or service increases, demand for the workers who make it also increases — and vice versa.

Objective 2 — Factors Affecting Demand for Labour

Several things determine how many workers a firm or an industry wants to hire:

1. Demand for the Final Product

As explained above, if consumers want more of a product, firms need more workers to produce it. Higher product demand → higher labour demand.

2. Productivity of Labour

If workers become more productive (i.e., they produce more output per hour), each worker generates more value for the firm. This makes hiring workers more attractive, so demand for labour increases.

3. Price of the Good or Service Produced

If the selling price of what workers produce rises, each worker becomes more valuable to the firm. This increases the demand for labour.

4. Cost of Capital (Machinery and Technology)

Workers and machines often do similar jobs — they are substitutes for each other. If machines become cheaper, firms may replace workers with machines, reducing labour demand. If machines become very expensive, firms may hire more workers instead, increasing labour demand.

5. Availability and Productivity of Other Factors of Production

If better technology or capital makes workers more productive, firms will demand more labour. Complementary inputs (things that work with labour) affect how much labour is demanded.

6. Wage Rate (the Price of Labour)

The higher the wage rate, the more expensive each worker is. Firms will demand fewer workers at higher wages. This is shown as a movement along the demand curve (covered in the next objective).

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