Tag Archives: Fisher equation

On his blog, John Cochrane offers a stripped down model and some intuition for why inflation would rise after an increase in the interest rate. The model features the usual Euler (IS) equation and a Mickey Mouse Phillips curve—inflation is proportional to consumption (or output). The intuition: During the time of high real interest rates — when the nominal rate has risen, but inflation has not yet caught up — consumption must grow faster [the Euler equation, DN]. … Since more consumption...

In his blog, John Cochrane registers disagreement with Larry Summers and reiterates his own argument that in a liquidity trap, interest rate policy does not have a liquidity effect and thus, only a long-run “expected inflation” or “Fisher” effect: When the liquidity effect is absent, the expected inflation effect is all that remains. Inflation must follow interest rates.