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Microeconomics: The Labour Market

Short and long run labour supply, transfer earnings and economic rent

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Overview

Recall questions on short and long run labour supply, transfer earnings and economic rent with calculations and diagrams, and why elite footballers earn large economic rent.

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Answer each one before you reveal it.

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Key term

Distinguish between the short run and the long run supply of labour to an occupation.

Key term

A shortage of qualified electricians pushes their pay sharply upwards. Why does the high pay persist for several years?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Distinguish between the short run and the long run supply of labour to an occupation.

    Model answer

    In the short run the pool of trained workers is broadly fixed, so supply can only respond through extra hours and those already qualified, while in the long run training, migration and career choices adjust and supply becomes far more elastic.

  2. 2

    A shortage of qualified electricians pushes their pay sharply upwards. Why does the high pay persist for several years?

    Model answer

    Short-run supply is close to fixed, so the shortage can only be cleared once new entrants complete an apprenticeship, which takes years.

  3. 3

    Define transfer earnings.

    Model answer

    Transfer earnings are the minimum payment needed to keep a factor of production in its present use, equal to what it could earn in its next best alternative use.

  4. 4

    Define economic rent.

    Model answer

    Economic rent is any payment to a factor of production above its transfer earnings, a surplus over the amount needed to keep it in that use.

  5. 5

    A software engineer earns £45,000 a year and would have stayed in the job for as little as £32,000. Calculate her transfer earnings and her economic rent.

    Model answer

    Her transfer earnings are £32,000 and her economic rent is £45,000 − £32,000 = £13,000 a year.

  6. 6

    What is measured on each axis of the diagram used to show economic rent and transfer earnings, and which curves appear on it?

    Model answer

    The wage rate is on the vertical axis and the quantity of labour on the horizontal axis, with the industry's upward-sloping supply of labour and downward-sloping demand for labour.

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An of demand.
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Economic growth means an increase in real output over a period.
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