Macroeconomic expectations of various economic agents are characterized by substantial crosssectional heterogeneity. This chapter focuses on heterogeneity in the expectations among professional forecasters, first presenting stylized facts and discussing theoretical explanations for heterogeneous...

We introduce the concept of “negative bubbles” as the mirror image of standard financial bubbles, in which positive feedback mechanisms may lead to transient accelerating price falls. To model these negative bubbles, we adapt the Johansen-Ledoit-Sornette (JLS) model of rational expectation...