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Microeconomics: The Labour Market

Labour productivity, unit labour costs and marginal revenue product

  • 3 things to know
  • Component 01

Overview

Recall questions on labour productivity and unit labour cost calculations, competitiveness, and marginal revenue product theory as the firm's demand curve for labour with its limitations.

What you need to know

Answer each one before you reveal it.

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Key term

Why can a substantial pay rise leave unit labour costs completely unchanged?

Numbers

A worker adds 12 units of output a day and each unit sells for £15 in a competitive market. Calculate the worker's marginal revenue product.

Key term

Define labour productivity.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Define labour productivity.

    Model answer

    Labour productivity is output per worker, or output per worker-hour, over a given period.

  2. 2

    Define unit labour cost.

    Model answer

    Unit labour cost is the labour cost of producing one unit of output, found by dividing total labour costs by total output.

  3. 3

    A factory has an annual wage bill of £600,000 and produces 30,000 units. Calculate its unit labour cost.

    Model answer

    Unit labour cost is £600,000 ÷ 30,000 = £20 per unit.

  4. 4

    Better working methods raise that factory's output to 40,000 units with the wage bill unchanged at £600,000. Calculate the new unit labour cost and the percentage fall.

    Model answer

    Unit labour cost becomes £600,000 ÷ 40,000 = £15 per unit, a fall of £5, which is 25% of the original £20.

  5. 5

    Why can a substantial pay rise leave unit labour costs completely unchanged?

    Model answer

    If output per worker rises in the same proportion as pay, the extra wage cost is spread over proportionately more units, so cost per unit is unchanged.

  6. 6

    Why do rising unit labour costs damage a country's international competitiveness?

    Model answer

    Domestic goods become dearer relative to foreign rivals, so exports fall and imports rise sharply.

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