We introduce and study no-good-deal valuation bounds defined in terms of expected utility. A utility-based good deal is a payoff whose expected utility is toohigh in comparison to the utility of its price. Forbidding good deals induces, viaduality, restrictions on pricing kernels and thereby...

We study the exponential utility indifference valuation of a contingent claim B in an incomplete market driven by two Brownian motions. The claim depends on a nontradable asset stochastically correlated with the traded asset available for hedging. We use martingale arguments to provide upper and...

Shareholder agreements govern the relations among shareholders in privately-held firms, such as joint ventures or venture capital-backed firms. We provide an explanation for the use of put and call options, tag-along rights, drag-along rights, demand rights, piggy-back rights, and catch-up...

We treat information acquisition by potential investors in IPOs asendogenous. With endogenous information, the critical question iswhy underwriters would allow investors to spend resources acquiringsuperior information intended solely to effect a wealth transfer. Weshow that institutional...

This paper studies modelling and existence issues for market models of option prices in a continuous-time framework with one stock, one bond and a family of European call options for one fixed maturity and all strikes. After arguing that (classical) implied volatilities are ill-suited for...

We characterize the conditions under which firms choose to (i) merge, (ii) form an alliance, or (iii) trade assets. For that prupose, we distinguish between the firms' assets (what can be traded in isolation), thei knowhow (what can be learned but not traded), and their core competencies (what...

When information is costly, a seller may wish to prevent prospective buyers from acquiring information, for the cost of information acquisition is ultimately borne by the seller. A seller can achieve the desired prevention of information acquisition through posted-price selling, by offering...

We provide a direct estimate of the magnitude of agency costs in U.S. publicly-held firms. Using a sample of 1,307 firms in 1992-1997, we compute an explicit performance benchmark that compares a firm’s actual Tobin’s Q to the Q∗ of a hypothetical fully-efficient firm having the same...

This paper studies modelling and existence issues for market models of stochastic implied volatility in a continuous-time framework with one stock, one bank account and a family of European options for all maturities with a fixed payoff function h. We first characterize absence of arbitrage in...

A generalized correlated random walk is a process X_k of partial sums of random variables Y_j such that (X,Y) forms a Markov chain. For a sequence X^n of such processes where each Y^n_j takes only two values, we prove weak convergence to a diffusion process whose generator is explicitly...