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How the Macroeconomy Works

The determinants of aggregate supply

  • 5 things to know
  • Papers 2 and 3

Overview

Wage rates, raw material prices and taxation in the short run, productivity and mobility in the long run.

What you need to know

Answer each one before you reveal it.

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Numbers

How do wage rates affect short-run aggregate supply?

Process

What shifts the SRAS curve leftward, and what shifts it right?

Process

Why is productivity a fundamental determinant of long-run aggregate supply?

Numbers

What is factor mobility, and how do factor mobility and economic incentives affect long-run aggregate supply?

Process

What is the shape of the long-run aggregate supply curve?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is one of the main determinants of short-run aggregate supply relating to the general level of prices in the economy?

    Model answer

    The price level is a main determinant of short-run aggregate supply.

  2. 2

    Besides the price level, what other main factor determines short-run aggregate supply?

    Model answer

    Production costs are a main determinant of short-run aggregate supply.

  3. 3

    How do changes in money wage rates affect the short-run aggregate supply curve?

    Model answer

    Changes in money wage rates shift the short-run aggregate supply curve, as wages are a significant component of production costs for firms.

  4. 4

    If workers successfully negotiate higher wages across the economy, in which direction would the short-run aggregate supply curve shift and why?

    Model answer

    The short-run aggregate supply curve would shift to the left because higher wages increase production costs for firms.

  5. 5

    Explain why a rise in raw material prices would cause the short-run aggregate supply curve to shift.

    Model answer

    Higher raw material prices increase production costs for firms, causing the short-run aggregate supply curve to shift.

  6. 6

    What would happen to the position of the short-run aggregate supply curve if energy prices fell significantly?

    Model answer

    A fall in energy prices reduces production costs, shifting the short-run aggregate supply curve to the right.

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