We survey literature on ambiguity with an emphasis on recent applications in macroeconomics and finance. Like risk, ambiguity leads to cautious behavior and uncertainty premia in asset markets. Unlike risk, ambiguity can generate first order welfare losses. As a result, precautionary behavior...

This paper studies how managers plan under uncertainty. In a new survey panel on German manufacturing firms, we show that uncertainty reflects change: Planning incorporates higher subjective uncertainty about future sales growth when the firm has just experienced unusual growth, and more so if...

Die Coronakrise hat die deutsche Wirtschaft in eine Rezession gestürzt, die viele Jobs bedroht. Tatsächlich hat der Beschäftigungsabbau bereits begonnen, wie Umfragen des ifo Instituts belegen. Aber über welche Kanäle trifft der Corona-Schock die deutschen Unternehmen? Dieser Beitrag...

We document a sizable OTC discount in the interdealer market for German sovereign bonds where exchange and over-the-counter trading coexist: the vast majority of OTC prices are favorable with respect to exchange quotes. This is a challenge for theories of OTC markets centered around search...