Question 1

What does the AD-AS model show about the economy?

Accepted Answer

The AD-AS model illustrates how aggregate demand and aggregate supply curves interact to determine the economy's equilibrium price level and real GDP. The vertical axis represents the price level, while the horizontal axis shows total output. The intersection point reveals where the economy reaches balance between overall spending and production capacity.

Question 2

What components make up aggregate demand in the economy?

Accepted Answer

Aggregate demand combines the actions of households, businesses, government, and net exports into one measure of overall demand. It represents the total quantity of goods and services demanded at different price levels. When prices fall, consumers can buy more with the same income, and exports become more attractive, increasing total demand.

Question 3

How does aggregate supply differ between short run and long run?

Accepted Answer

In the short run, firms increase production when prices rise if costs remain stable. However, in the long run, output depends more on available resources and productivity rather than price levels. This distinction helps explain why economies respond differently to price changes over different time horizons.

Question 4

What happens when government spending increases in the AD-AS model?

Accepted Answer

When government increases spending, total aggregate demand rises, shifting the demand curve. This typically results in higher equilibrium output and increased price levels. The economy moves to a new intersection point where both output and prices reflect the increased demand from government expenditure.

Question 5

How do rising raw material costs affect the AD-AS model?

Accepted Answer

Rising raw material costs reduce firms' willingness to produce at existing price levels, shifting the aggregate supply curve leftward. This results in higher prices and lower output simultaneously, a condition known as stagflation. The economy reaches a new equilibrium with less production and higher price levels.

Question 6

Why do economists use the AD-AS model to study economic issues?

Accepted Answer

Economists use the AD-AS model to analyze key macroeconomic issues including inflation, unemployment, and business cycles. The model helps policymakers understand how changes in demand or supply affect economic stability and output. It provides a straightforward framework for examining the balance between spending and production in the economy.

Question 7

What does the intersection point of AD and AS curves represent?

Accepted Answer

The intersection of aggregate demand and aggregate supply curves reveals the economy's equilibrium price level and output. This point shows the current balance between what consumers and businesses want to buy and what producers are willing to supply. Changes in either curve shift this equilibrium, affecting both prices and total output.

総需要と総供給：概要