Knowledge that Transforms

ABSTRACT The stock market appreciates by an average of 24 percent in real dollar terms when countries attempt to stabilize annual inflation rates that are greater than 40 percent. In contrast, the average market response is 0 when the prestabilization rate of inflation is less than 40 percent. These results suggest that the potential long‐run benefits of stabilization may dominate shortrun costs at high levels of inflation, but at low to moderate levels of inflation, benefits may be offset by costs in a present value sense. Stock market responses also help predict the change in inflation and output in the year following all 81 stabilization efforts.

ABSTRACT We show that repurchases have not only became an important form of payout for U.S. corporations, but also that firms finance their share repurchases with funds that otherwise would have been used to increase dividends. We find that young firms have a higher propensity to pay cash through repurchases than they did in the past and that repurchases have become the preferred form of initiating a cash payout. Although large, established firms have generally not cut their dividends, they also show a higher propensity to pay out cash through repurchases. These findings indicate that firms have gradually substituted repurchases for dividends. Our results also suggest that before 1983, regulatory constraints inhibited firms from aggressively repurchasing shares.

ABSTRACT This paper studies the asset‐pricing implications of parameter uncertainty. We show that, when investors must learn about expected cash flows, empirical tests can find patterns in the data that differ from those perceived by rational investors. Returns might appear predictable to an econometrician, or appear to deviate from the Capital Asset Pricing Model, but investors can neither perceive nor exploit this predictability. Returns may also appear excessively volatile even though prices react efficiently to cash‐flow news. We conclude that parameter uncertainty can be important for characterizing and testing market efficiency.

ABSTRACT Using a sample of 44,288 firm‐ears between 1984 and 1997, we document an increase in the extent of global diversification over time. This trend does not reflect a substitution of global for industrial diversification. We also find that global diversification results in average valuation discounts of approximately the same magnitude as those for industrial diversification. Analysis of the changes in excess value associated with changes in diversification reveals that increases in global diversification reduce excess value, while reductions in global diversification increase excess value. These findings support the view that the costs of global diversification outweigh the benefits.

ABSTRACT In this study, we use cross‐sectional regressions to estimate the value of the debt tax shield. Recognizing that debt is correlated with the value of operations along nontax dimensions, we estimate reverse regressions in which we regress future profitability on firm value and debt rather than regressing firm value on debt and profitability. Reversing the regressions mitigates bias and facilitates the use of market information to control for differences in risk and expected growth. Our estimated value for the debt tax shield is approximately 40 percent (10 percent) of debt balances (firm value), net of the personal tax disadvantage of debt.

ABSTRACT This paper examines the effects of competition and market structure on equity option bid‐ask spreads from 1986 to 1997. Options listed on multiple exchanges have narrower spreads than those listed on a single exchange, but the difference diminishes as option volume increases. Option spreads become wider when a competing exchange delists the option. Options traded under a “Designated Primary Marketmaker” (DPM) have narrower quoted spreads than those traded in a traditional open outcry crowd. Effective spreads are found to be slightly narrower under the DPM than in the crowd, but only since 1992, and only on low‐volume options.

ABSTRACT Firms differ in the extent to which they “pass through” changes in exchange rates into foreign currency prices and in their “exposure” to exchange rates—the responsiveness of their profits to changes in exchange rates. Because pricing affects profitability, a firm's pass‐through and exposure should be related. This paper develops models of exporting firms under imperfect competition to study these related phenomena. From these models we derive the optimal pass‐through decisions and the resulting exchange rate exposure. The models are estimated on eight Japanese export industries using both the price data pass‐through and financial data for exposure.

ABSTRACT Momentum effects in stock returns need not imply investor irrationality, heterogeneous information, or market frictions. A simple, single‐firm model with a standard pricing kernel can produce such effects when expected dividend growth rates vary over time. An enhanced model, under which persistent growth rate shocks occur episodically, can match many of the features documented by the empirical research. The same basic mechanism could potentially account for underreaction anomalies in general.

We examine the investment behavior of firms before and after being spun off from their parent companies. Their investment after the spin‐off is significantly more sensitive to measures of investment opportunities (e.g., industry Tobin's Q or industry investment) than it is before the spin‐off. Spin‐offs tend to cut investment in low Q industries and increase investment in high Q industries. These changes are observed primarily in spin‐offs of firms in industries unrelated to the parents' industries and in spin‐offs where the stock market reacts favorably to the spin‐off announcement. Our findings suggest that spin‐offs may improve the allocation of capital.

to prepare this retrospective, and for bringing to the task his unique erudition and perspective. THIS YEAR MARKS the fiftieth anniversary of the publication of Harry Markowitz’s landmark paper, “Portfolio Selection, ” which appeared in the March 1952 issue of the Journal of Finance. With the hindsight of many years, we can see that this was the moment of the birth of modern financial economics. Although the baby had a healthy delivery, it had to grow into its teenage years before a hint of its full promise became apparent. What has always impressed me most about Markowitz’s 1952 paper is that it seemed to come out of nowhere. Compared to the work of his 1990 co-Nobel Prize winners ~Sharpe primarily for his paper on the capital asset pricing model and Miller for his paper on capital structure!, Markowitz’s paper seems to have more of this flavor. In 1676, Sir Isaac Newton wrote his friend Robert Hooke, “If I have seen further it is by standing on the shoulders of giants ” ~Newton ~1959!! and that is true of Markowitz as well, but,