We analyze the effect of a decision support tool designed to help physicians detect and correct medical "missteps". The data comes from a randomized trial of the technology on a population of commercial HMO patients. The key findings are that the new information technology lowers average charges...

We present a new methodology for ranking business schools. Unlike previous rankings based on subjective survey responses (from CEOs, business school deans, recruiters, or graduates), our approach uses data derived from the labor market for new MBAs. We adjust programs' salaries for the quality...

Interpreting accruals as working capital investment, we hypothesize that firms rationally adjust their investment to respond to discount rate changes. Consistent with the optimal investment hypothesis, we document that (i) the predictive power of accruals for future stock returns increases with...

In this paper, we examine the propensity for U.S. public companies to become targets for private equity-backed, take-private transactions. We consider the characteristics of 483 private equity-backed deals in the 2000-2007 period relative to public companies, and find that, in addition to the...

Mergers and acquisitions are a fast way for a firm to grow. Using plant-level data, we examine how firms redraw their boundaries after acquisitions. We find that there is a large amount of restructuring in a short period following mergers. Acquirers sell 27% and close 19% of acquired plants...

We document that ownership by officers and directors of publicly-traded firms is on average higher today than earlier in the century. Managerial ownership rises from 13 percent for the universe of exchange-listed corporations in 1935, the earliest year for which such data exist, to 21 percent in...

Venture capital contracts give VCs enormous power over entrepreneurs and early equity investors of portfolio companies. A large literature examines how these contractual terms protect VCs against misbehavior by entrepreneurs. But what constrains misbehavior by VCs? We provide the first...

We document that net equity issuance is considerably more sensitive to aggregate stock returns and Q's than to firm-level stock returns and Q's. Very similar patterns also emerge when we look at merger activity. In light of earlier work (Campbell 1991, Vuolteenaho 2002) which finds that...

We examine how product differentiation influences mergers and acquisitions and the ability of firms to exploit product market synergies. Using novel text-based analysis of firm 10K product descriptions, we find three key results. (1) Firms are more likely to enter restructuring transactions when...

We compare the trading performance of independent directors and other officers of the firm. We find that independent directors earn positive and substantial abnormal returns when they purchase their company stock, and that the difference with the same firm's officers is relatively small at most...