The bulk of literature on real rigidity attempts to identify sources of real rigidity in market imperfections while assuming that the money supply is exogenously set. This paper shows that monetary policy preferences affect the responsiveness of marginal cost to output and through this channel...

This paper shows that in macroeconomic models of product differentiation that are built on CES utility specifications the widely used assumption of approximating cross price effects to zero, (since Dixit-Stiglitz 1979), plays indeed no crucial role. This is true not only when a large number of...