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The Economic Cycle

Aggregate supply, input costs and productivity

  • 3 things to know
  • Papers 2 and 3

Overview

Aggregate supply in the short and long run, input costs that shift short-run aggregate supply including oil prices, depreciation and national insurance, productivity against production, how productivity shifts long-run aggregate supply and allows non-inflationary wage rises, unit labour costs, and migration and other long-run factors.

What you need to know

Answer each one before you reveal it.

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Key term

How does short-run aggregate supply differ from long-run aggregate supply?

Key term

Name three input costs whose change shifts short-run aggregate supply.

Key term

Explain how a rise in world oil prices affects short-run aggregate supply.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is aggregate supply?

    Model answer

    Aggregate supply is the total output that firms in an economy are willing and able to produce at each price level over a given period.

  2. 2

    How does short-run aggregate supply differ from long-run aggregate supply?

    Model answer

    Short-run aggregate supply shows output when input prices such as wages are fixed, whereas long-run aggregate supply shows the economy's productive potential once all prices and wages have adjusted.

  3. 3

    Name three input costs whose change shifts short-run aggregate supply.

    Model answer

    Wage rates, the price of raw materials and energy, and the cost of imported components.

  4. 4

    Explain how a rise in world oil prices affects short-run aggregate supply.

    Model answer

    Energy and transport are inputs to almost every industry, so costs rise at every level of output and the short-run aggregate supply curve shifts to the left.

  5. 5

    How does a depreciation of the currency affect aggregate supply?

    Model answer

    Imported raw materials and components cost more in domestic currency, so firms' costs rise and short-run aggregate supply shifts to the left.

  6. 6

    How does an increase in employers' national insurance contributions affect aggregate supply?

    Model answer

    It raises the cost of employing each worker, so firms' costs rise at every level of output and short-run aggregate supply shifts to the left.

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