We analyze dynamic trading by an activist investor who can expend costly effort to affect firm value. We obtain the equilibrium in closed form for a general activism technology, including both binary and continuous outcomes. Variation in parameters can produce either positive or negative...

This paper empirically analyses the effect of foreign block acquisitions on the U.S. target firms' credit risk as captured by their CDS. The involvement of foreign investors leads to a significant increase in the target firms' CDS spreads. This effect is stronger when foreign owners are...

This paper documents that underpriced firms substitute R&D spending with share buybacks to the detriment of innovation. To identify underpriced firms, I introduce a novel measure of non-fundamental price pressure induced by indirect exposure to industry-level shocks. This measure addresses...

We examine the determinants of startups' exits using novel technology measures based on patent text. We propose that innovation in rapidly evolving technology areas substitute existing technologies, creating a path to an independent market presence. Startups innovating in rapidly evolving areas...

We develop a two-period general equilibrium model of portfolio delegation with competitive, differentially skilled managers and convex compensation contracts. We show that convex incentives lead to significant equilibrium mispricing, but reduce price volatility. In particular, price...

We use novel data on individual activity in a sports betting market to study the effect of past performance sequences on individual behavior in a real market. The revelation of fundamental values in this market enables us to disentangle whether behavior is caused by sentiment or by superior...

I model a market in which a trader with superior information about an asset is subject to careful scrutiny by another agent who immediately observes the trading decisions of the informed agent with some noise and engages in (klepto)parasitic behavior by imicking the informed trader and trading...

How do market prices adjust towards stability after a shock? Tracking individual stock prices following their dramatic shakeup after Donald Trump's surprise election provides an answer. Prices moved overwhelmingly in the appropriate direction on the first post-election day, albeit much too...