Keynesian Economics vs Supply-Side Economics
Keynesian Economics and Supply-Side Economics are two Economic Systems & Schools of Thought concepts in AP Economics that students often mix up. In short: keynesian economics is keynesian economics holds that aggregate demand drives output in the short run and that government should use fiscal and monetary policy to fight recessions. Meanwhile, supply-side economics is supply-side economics argues that lower taxes and less regulation boost growth by increasing the incentive to work, save, and invest. Here is how they compare side by side.
Keynesian economics holds that aggregate demand drives output in the short run and that government should use fiscal and monetary policy to fight recessions.
Developed by John Maynard Keynes, it argues that economies can get stuck below full employment, so active demand management (spending and tax policy) is needed. It underpins the use of stimulus during downturns and the AD-AS model's short run.
Supply-side economics argues that lower taxes and less regulation boost growth by increasing the incentive to work, save, and invest.
It focuses on shifting long-run aggregate supply right rather than managing demand. The Laffer curve suggests tax cuts can sometimes raise revenue by expanding activity. Critics question the size of those effects and warn of larger deficits.
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