"Why is inflation persistently high in some periods and low in others? The reason may be absence of commitment in monetary policy. In a standard model, absence of commitment leads to multiple equilibria, or expectation traps, even without trigger strategies. In these traps, expectations of high...

"In his famous 1987 monograph, Robert Lucas argued that further stabilizing the business cycles that persisted in the post-War era was pointless, because these cycles had a negligible effect on societal well- being. In particular, Lucas demonstrated that society should be willing to pay only a...