We study two decompositions of inflation, , motivated by a New Keynesian Pricing Equation. The first uses four components: lagged , expected future , real unit labor cost ( ), and a residual. The second uses two components: fundamental inflation (discounted expected future ) and a residual. We...

Are business cycles mainly the result of permanent shocks to productivity? This paper uses a long-run restriction implied by a large class of real-business-cycle models--identifying permanent productivity shocks as shocks to the common stochastic trend in output, consumption, and investment--to...