Knowledge that Transforms

This dissertation analyzes equilibrium in a dynamic pure-exchange economy under a generalization of Merton's (1987) investor recognition hypothesis (IRH). Because of information costs, a class of investors is assumed to possess incomplete information, which suffices to implement only a particular trading strategy. The IRH is mapped into corresponding portfolio restrictions that bind a subset of agents. The model is formulated in continuous time, and characterization of risk premia, interest rates, and consumption policies of the heterogeneous agents is provided. The model implies that a risk premium on a less visible stock need not be higher than that on a more visible stock with a lower volatility, all else being equal. This contrasts with results previously derived in a static mean-variance setting. An empirical analysis evaluates the IRH based on the premise that the trading strategy of informationally constrained agents is well captured by a combination of two portfolios. The first portfolio represents their (direct) investment in stocks with high visibility. The second portfolio proxies for their exposure (via delegated investment) to stocks with good past-return performance (consistent with documented evidence regarding portfolios of money managers). The findings suggest that a consumption-based capital asset pricing model (CCAPM) augmented by the IRH is a more realistic model than the traditional CCAPM for explaining the cross-sectional variation in unconditional expected equity returns.

This paper investigates how firms’ bidding behavior in various auctions is affected by capital structure. A theoretical model is developed where the first price sealed bid and the English auction are examined. We find as debt levels increase, firms tend to decrease their bids. The lower bids give the competition incentives to decrease their bid as well. These results are then investigated empirically using the recent FCC spectrum auctions. Consistent with the theoretical model, larger debt levels of the bidding firm and the competition tend to lead to lower bids. Additional determinants of bidding behavior in these auctions are also analyzed.

Higher initial margin requirements are associated with lower subsequent stock market volatility during normal and bull periods, but show no relationship during bear periods. Higher margins are also negatively related to the conditional mean of stock returns, apparently because they reduce systemic risk. We conclude that a prudential rule for setting margins (or other regulatory restrictions) is to lower them in sharply declining markets in order to enhance liquidity and avoid a depyramiding effect in stock prices, but subsequently raise them and keep them at the higher level in order to prevent a future pyramiding effect

I test the hypothesis that short debt maturity attenuates the negative effect of growth opportunities on leverage. Using simultaneous equations with leverage and maturity endogenous, I find strong support for an economically significant attenuation effect. The negative effect of growth opportunities on leverage for firms with all shorter-term debt is less than one-sixth as large as the effect for firms with all longer-term debt. Short maturity also increases liquidity risk, however, which negatively affects leverage. The results suggest that firms trade off the cost of underinvestment problems against the cost of liquidity risk when choosing short maturity.

This article uses a new dataset of credit card accounts to analyze credit card delinquency, personal bankruptcy, and the stability of credit risk models. We estimate duration models for default and assess the relative importance of different variables in predicting default. We investigate how the propensity to default has changed over time, disentangling the two leading explanations for the recent increase in default rates—a deterioration in the risk composition of borrowers versus an increase in borrowers’ willingness to default due to declines in default costs. Even after controlling for risk composition and economic fundamentals, the propensity to default significantly increased between 1995 and 1997. Standard default models missed an important time-varying default factor, consistent with a decline in default costs.