"I study battles between short sellers and firms. Firms use a variety of methods to impede short selling, including legal threats, investigations, lawsuits, and various technical actions intended to create a short squeeze. These actions create short sale constraints. Consistent with the...

"We examine some basic data on the evolution of aggregate short interest, both during the dot-com era, and at other times in history. Total short interest moves in a countercyclical fashion. For example, short interest in NASDAQ stocks actually declines as the NASDAQ index approaches its peak....

Capital expenditure plans at the beginning of the year, from a US government survey of firms, explain more than three quarters of the variation in real annual aggregate investment growth between 1948 and 1993. The negative correlation of contemporaneous investment and stock returns is explained...

This paper examines micro data on U.S. firms' inventories during different macroeconomic episodes. Much of the analysis focuses on the 1981-82 recession, a recession that was apparently precipitated by tight monetary policy. We find important cross-sectional effects in this period: firms that...

We test whether the time-series positive correlation of inflation and intermarket relative price variability is also present in a cross-section of US cities. We find this correlation to be a robust empirical regularity: cities which have higher than average inflation also have higher than...