This paper derives the curvature properties of the short-run Phillips curve in a class of canonical models of price-setting frictions. Contrary to conventional thinking, the Phillips curve is asymptotically horizontal for high levels of economic activity and asymptotically vertical for low...

This paper has two parts. In the first part, I demonstrate that, in the absence of price and wage bounds, monetary models do not have current equilibria - and so lack predictive content - for a wide range of possible policy rules and/or beliefs about future equilibrium outcomes. This...

Over the past thirty years, a great deal of business cycle research has been based on purely real models that abstract from the presence of nominal rigidities, and so (at least implicitly) assume that the Phillips curve is vertical. In this paper, I show that such models are fragile, in the...

Over the past thirty years, a great deal of business cycle research has been based on purely real models that abstract from the presence of nominal rigidities, and so (at least implicitly) assume that the Phillips curve is vertical. In this paper, I show that such models are fragile, in the...

This paper has two parts. In the first part, I demonstrate that, in the absence of price and wage bounds, monetary models do not have current equilibria - and so lack predictive content - for a wide range of possible policy rules and/or beliefs about future equilibrium outcomes. This...