Research Lab

Focusing on asset returns governed by a factor structure, the APT is a one-period model, in which preclusion of arbitrage over static portfolios of these assets leads to a linear relation between the expected return and its covariance with the factors. The APT, however, does not preclude arbitrage over dynamic portfolios. Consequently, applying the model to evaluate managed portfolios is contradictory to the no-arbitrage spirit of the model.

This paper examines inventory management from an incentive perspective. We show that when a manager has private information about future attainable revenues, the residual income performance measure based on historical cost can achieve optimal (second-best) incentives with regard to managerial effort as well as production and sales decisions. The LIFO (last-in—first-out) inventory flow rule is shown to be preferable to the FIFO (first-in—first-out) rule for the purpose of aligning incentives.

We survey the literature analyzing the price formation and trading process, and the consequences of market organization for price discovery and welfare. We offer a synthesis of the theoretical microfoundations and empirical approaches. Within this framework, we confront adverse selection, inventory costs and market power theories to the evidence on transactions costs and price impact. Building on these results, we proceed to an equilibrium analysis of policy issues.

There are five topics of debate that I will cover today: 1) Does inflation targeting improve economic performance? 2) Is inflation targeting consistent with the dual mandate? 3) Can central bank transparency go too far? 4) Would a price level target be better than an inflation target? 5) Would a point target be better than a target range?

In this address, I first describe the hallmarks of the Greenspan Fed and the advantages of this strategy that have produced such favorable economic outcomes. Then I look at how well the Fed might do after Greenspan and what challenges it might face. This discussion then leads naturally to suggestions for how the Fed should operate in the future to continue the excellent performance it has achived under Alan Greenspan.

This paper lays out a comprehensive solution to the problem of accounting for claims based the performance of a firm's stock price. The accounting covers employee stock options, stock appreciation rights, put and call options, convertible debt and preferred stock, warrants, and other hybrid securities. This issue has vexed the Financial Accounting Standards Board (FASB) and International Accounting Standards Board (IASB) who have approached the problem on a piecemeal basis, leading to inconsistent treatments of claims that in substance are very similar.

We develop a general equilibrium model of a production economy which has a risky production technology as well as a growth option to expand the scale of the productive sector of the economy. We show that when confronted with growth options, the representative consumer may sharply alter consumption rates to improve the likelihood of investment. This reduction in consumption is accompanied by an erosion of the option value of waiting to invest, leading to investment near the zero NPV threshold.

This paper outlines a financial statement analysis for use in equity valuation. Standard profitability analysis is incorporated, and extended, and is complemented with an analysis of growth. The perspective is one of forecasting payoffs to equities. So financial statement analysis is presented first as a matter of pro forma analysis of the future, with forecasted ratios viewed as building blocks of forecasts of payoffs. The analysis of current financial statements is then seen as a matter of identifying current ratios as predictors of the future ratios that drive equity payoffs.