Which of the following does the aggregate expenditure model seek to explain: long-run economic g

Which of the following does the aggregate expenditure model...

Key Concepts

Aggregate Expenditure Model

This model is a macroeconomic framework that illustrates how total spending, comprising consumption, investment, government spending, and net exports, determines an economy’s overall level of income and output. It focuses on the short-run equilibrium where aggregate demand meets aggregate supply, making it instrumental in explaining fluctuations in economic activity.

Business Cycle

The business cycle represents the short-run fluctuations in economic activity, characterized by periods of expansion and recession. The aggregate expenditure model contributes to understanding the business cycle by linking changes in spending behavior to variations in real GDP, thereby explaining the occurrence of economic ups and downs.

Transcript

00:01 Let's look at this model of gdp yearly versus aggregate expenditure to look at what this model can explain about each of these four concepts, right, in which one is most useful to explain.

00:16 So our options are long run economic growth, the business cycle, inflation, or cyclical unemployment.

00:22 All right.

00:22 So here i have drawn.

00:23 So first of all, what is aggregate expenditure, right? that's how much was sold during the year, how much was purchased, versus gdp, which was how much.

00:31 Was produced.

00:33 So this 45 degree line here is when everything that was produced in the year was sold, right? so there was no surplus or shortage.

00:41 So if we look at this area over here on the left, where aggregate expenditure is more than gdp, that means that people bought more than what was produced.

00:51 Right.

00:51 So in that case, if we bought more than what was produced this year, we had to buy from inventories that we had produced in years prior, right? so our inventories decreased because we were dipping into them to exceed our expenditure over our gdp this year.

01:06 And on the flip side, on the right side, we have aggregate expenditure less than gdp, right? so we bought less than what was produced in this year.

01:15 So we had some leftover that was produced, so inventories increased for firms.

01:19 So firms are going to react to these different cases when they're not at the point where gdp is equal to aggregate expenditure...

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