Aggregate Demand and Aggregate Supply

Name: Aggregate Demand and Aggregate Supply
Uploaded: 2026-05-13T00:00:00+00:00
Duration: 4 min 52 s
Description: Almost every macro question — inflation, recession, stagflation, central bank policy — comes back to two curves and where they cross. A short walkthrough of aggregate demand (consumption, investment, government, net exports), the short-run and long-run aggregate supply curves, what happens when each one shifts, and why central banks spend most of their attention managing AD.

1Aggregate demand (AD) = consumption + investment + government spending + net exports — the total demand for goods and services at any price level
2Short-run aggregate supply (SRAS) slopes upward — higher prices incentivize firms to produce more in the short run
3Long-run aggregate supply (LRAS) is vertical — it's the economy's maximum sustainable output, set by capital, labor, and technology, independent of price
4Where AD meets SRAS gives the current price level and output; where AD meets LRAS shows whether the economy is above, below, or at sustainable capacity
5Demand shocks shift AD — a rightward shift produces inflation plus growth, a leftward shift produces deflation plus recession
6Supply shocks shift SRAS — a leftward shift produces stagflation (inflation + stagnation), a rightward shift produces growth with falling prices
7Central banks target AD because they can move it quickly via interest rates — when AD runs above LRAS they tighten, when AD falls below LRAS they ease
8Supply shocks are the hardest policy problem — tightening to cool inflation from a leftward SRAS shift makes the recession worse without addressing the cause

Key Takeaways