Use the graph below to answer the following questions. a....

Use the graph below to answer the following questions. a. Which of the points $A, B, C,$ or $D$ can represent a longrun equilibrium? b. Suppose that initially the economy is at point $A$. If aggregate demand increases from $A D_{1}$ to $A D_{2}$, which point represents short-run equilibrium? Which point represents the eventual long-run equilibrium? Briefly explain how the economy adjusts from the short-run equilibrium to the long-run equilibrium.

Use the graph below to answer the following questions.
a. Which of the points $A, B, C,$ or $D$ can represent a longrun equilibrium?
b. Suppose that initially the economy is at point $A$. If aggregate demand increases from $A D_{1}$ to $A D_{2}$, which point represents short-run equilibrium? Which point represents the eventual long-run equilibrium? Briefly explain how the economy adjusts from the short-run equilibrium to the long-run equilibrium.

Key Concepts

Short-Run Equilibrium

Short-run equilibrium occurs at the intersection of aggregate demand and short-run aggregate supply, even if that point does not coincide with the long-run aggregate supply. In the short run, due to fixed wages and prices, the equilibrium output may differ from the potential output, creating either inflationary or recessionary gaps that signal temporary imbalances in the economy.

Aggregate Demand-Aggregate Supply Model

The AD-AS model is a fundamental framework in macroeconomics used to illustrate the relationship between total demand for goods and services (aggregate demand) and the total supply of goods and services (aggregate supply) in an economy. It incorporates both short-run aggregate supply, which can be affected by price and wage rigidities, and long-run aggregate supply, which reflects the economy’s potential output when resources are fully employed. This model helps explain how economies reach equilibrium and respond to shocks.

Long-Run Equilibrium

Long-run equilibrium is realized when the aggregate demand curve, the short-run aggregate supply curve, and the long-run aggregate supply curve all intersect at the economy’s potential output. At this point, the economy is operating efficiently with full employment, and there is no inherent pressure for inflation or deflation because wages and prices have fully adjusted to any shocks.

Adjustment Process from Short-Run to Long-Run Equilibrium

The adjustment process involves changes in wages, prices, and expectations that help the economy move from a short-run disequilibrium to long-run equilibrium. When, for example, an increase in aggregate demand leads to a short-run equilibrium above potential output, upward pressure on wages and prices gradually shifts the short-run aggregate supply curve until the intersection with aggregate demand aligns with the long-run aggregate supply, restoring the economy to its potential output.

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