Represents the total change in aggregate demand. if government purchases increased by $50 billion, then the distance from point a to point b $50 billion.

The shift from AD1 to AD2 represents the total change in aggregate demand. If government purchases increased by $50 billion, then the distance from point A to point B would be greater than $50 billion.

Explanation:

Basically, aggregate demand can suffer two types of movements: displacements or changes in the slope. We are assuming a straight slope, but we could well analyze the case of an aggregate demand that is not straight.

DISPLACEMENTS

They are produced by changes in autonomous consumption.  Changes in autonomous consumption may be due to changes in:

- Income distribution

- Access to credit

- Expectations

- Population changes

- Changes in relative prices between goods that belong to autonomous consumption (some foods) and goods that do not belong to autonomous consumption

CHANGES IN THE PENDING

They are produced by changes in the marginal rate to be consumed.  Changes in the marginal rate to be consumed may occur due to:

- Changes in the utility function: they can change the preference for savings.

- Changes in income distribution

- Changes in the interest rate

The shift from AD1 to AD2 represents the total change in aggregate demand. If government purchases increased by $50 billion, then the distance from point A to point B would be greater than $50 billion.

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