Long-run aggregate supply | Aggregate demand and aggregate supply | Macroeconomics | Khan Academy

TL;DR

This video explains aggregate supply in the long run, where fixed costs and contracts have expired, and price does not affect real GDP.

Transcript

Narrator: We've talked a lot about aggregate demand over the last few videos, so in this video, I thought I would talk a little bit about aggregate supply. In particular, we're going to think about aggregate supply in the long-run. In economics, whether it's in micro or macro economics, when we think about long-run, we're thinking about enough time... Read More

Key Insights

• 👻 Aggregate supply in the long run occurs when fixed costs and contracts have expired, allowing for adjustments and renegotiations.
• 🏃 Real GDP in the long run is not influenced by prices, representing the natural level of productivity.
• 🫱 Various factors, such as population growth, technological advancements, resource discoveries, and war, can shift the long-run aggregate supply curve.
• 💨 The long-run aggregate supply curve is based on simplifying assumptions, as economics aims to model the economy in a manageable way.
• 💱 Price in aggregate supply represents a numeric value and does not account for changes in human behavior or technological advancements.
• 🏃 Changes in productivity can cause the long-run aggregate supply curve to shift, either increasing or decreasing the natural level of productivity.
• 🧑‍🏭 The long-run aggregate supply curve is a snapshot in time, and other factors that change can cause the curve to shift in either direction.

Questions & Answers

Q: What is the difference between aggregate supply in the short run and the long run?

In the short run, aggregate supply is influenced by fixed costs and contracts, while in the long run, they have expired, allowing for adjustments and renegotiations.

Q: How does real GDP relate to aggregate supply in the long run?

Real GDP in the long run is independent of prices. It represents the natural level of productivity and remains the same regardless of price changes.

Q: What factors can shift the long-run aggregate supply curve?

Factors like population growth, technological improvements, discovery of resources, and war can shift the long-run aggregate supply curve.

Q: How does aggregate supply in the long run account for changes in productivity over time?

The long-run aggregate supply curve assumes no changes in productivity. If there are changes, such as technological advancements, the curve will shift accordingly.

Summary & Key Takeaways

• The video discusses aggregate supply in the long run, which occurs when fixed costs and contracts have expired.

• In the long run, real GDP is independent of prices, representing the natural level of productivity.

• Various factors such as population growth, technological improvements, discovery of resources, and war can shift the long-run aggregate supply curve.