We document three new empirical facts: (i) monetary policy shocks increase the markup dispersion across firms, (ii) they increase the relative markup of firms with stickier prices, and (iii) firms with stickier prices have higher markups. This is consis- tent with a New Keynesian model in which...

We study how the interaction of market power and nominal price rigidity influences inflation dynamics. We formulate a tractable model of oligopolistic competition and sticky prices and derive closed-form expressions for the pass-through of idiosyncratic and common cost shocks to firms' prices....

Firms’ market power, measured by markups, has risen substantially and unequally across sectors. To evaluate the implications of these trends for monetary non-neutrality, we develop a quantitative menu cost model that covers multiple sectors with heterogeneous degrees of market competition. Two...

Diese Dissertation beschäftigt sich mit den makroökonomischen Konsequenzen der Annahme heterogener Firmen. Die geldpolitischen Implikationen stehen dabei im Vordergrund. In den ersten beiden, theoretisch ausgerichteten Kapiteln liegt der Fokus auf der Tatsache, dass Firmen unterschiedlich...