What best defines an aggregate supply shock?

What best defines an aggregate supply shock?

• A. An unexpected event that changes the supply of a product or commodity, resulting in a sudden change in its price.
• B. A planned policy action by the central bank to adjust interest rates.
• C. A long-term trend in consumer preferences.
• D. A change in government tax policy that affects demand.

Answer: (A)

The idea being tested is what counts as an aggregate supply shock. An aggregate supply shock is an unexpected event that shifts the economy’s productive capacity or costs, changing the supply of goods and services available. Because it comes from the supply side rather than policy or demand, it often triggers a rapid change in the overall price level (and can affect output in the short run). For example, a surprise spike in oil prices raises production costs across many industries, reducing supply and pushing prices higher while potentially reducing output. This matters because other options describe changes that influence demand or policy rather than the supply side. A central bank action to adjust interest rates is a monetary policy move that affects demand and financial conditions. A long-term trend in consumer preferences is a shift in demand due to changing tastes. A tax policy change that affects demand alters spending behavior rather than the economy’s ability to produce. So, the best definition is an unexpected supply-side disruption that leads to a sudden change in price and, often, output.

The idea being tested is what counts as an aggregate supply shock. An aggregate supply shock is an unexpected event that shifts the economy’s productive capacity or costs, changing the supply of goods and services available. Because it comes from the supply side rather than policy or demand, it often triggers a rapid change in the overall price level (and can affect output in the short run). For example, a surprise spike in oil prices raises production costs across many industries, reducing supply and pushing prices higher while potentially reducing output.

This matters because other options describe changes that influence demand or policy rather than the supply side. A central bank action to adjust interest rates is a monetary policy move that affects demand and financial conditions. A long-term trend in consumer preferences is a shift in demand due to changing tastes. A tax policy change that affects demand alters spending behavior rather than the economy’s ability to produce.

So, the best definition is an unexpected supply-side disruption that leads to a sudden change in price and, often, output.