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Recessionary and Inflationary Gap

What is the Recessionary and Inflationary Gap?

Written by Jason Gordon

Updated at March 20th, 2023

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What is the Recessionary and Inflationary Gap?

Keynes argued that, for reasons we explain shortly, aggregate demand is not stable—that it can change unexpectedly. Suppose the economy starts where AD intersects SRAS at P0 and Yp. Because Yp is potential output, the economy is at full employment. Because AD is volatile, it can easily fall. Thus, even if we start at Yp, if AD falls, then we find ourselves in what Keynes termed a recessionary gap. The economy is in equilibrium but with less than full employment, as Y1. Keynes believed that the economy would tend to stay in a recessionary gap, with its attendant unemployment, for a significant period of time.

What is an Inflationary Gap?

In the same way (although we do not show it in the figure), if AD increases, the economy could experience an inflationary gap, where demand is attempting to push the economy past potential output. Consequently, the economy experiences inflation. The key policy implication for either situation is that government needs to step in and close the gap, increasing spending during recessions and decreasing spending during booms to return aggregate demand to match potential output.

recessionary gap inflationary gap

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