Information, Trading, and Volatility: Evidence from Weather-Sensitive Markets

We find that trading‐ versus nontrading‐period variance ratios in weather‐sensitive markets are lower than those in the equity market and higher than those in the currency market. The variance ratios are also substantially lower during periods of the year when prices are most sensitive to the weather. Moreover, the comovement of returns and volatilities for related commodities is stronger during the weather‐sensitive season, largely due to stronger comovement during nontrading periods. These results are consistent with a strong link between prices and public information flow and cannot be explained by pricing errors or changes in trading activity.     

The Marginal Costs of Electricity Supply in Victoria*

This paper discusses some of the determinants of the costs of supplying electricity by season, by time of day and by location. A model is constructed of the State Electricity Commission of Victoria grid to illustrate the propositions. It is found that current tariffs bear little relationship to the opportunity costs of supplying electricity.     

Accounting for Forward Rates in Markets for Foreign Currency

Forward and spot exchange rates between major currencies imply large standard deviations of both predictable returns from currency speculation and of the equilibrium price measure (the intertemporal marginal rate of substitution). Representative agent theory with time-additive preferences cannot account for either of these properties. We show that the theory does considerably better along these dimensions when the representative agent's preferences exhibit habit persistence, but that the theory fails to reproduce some of the other properties of the data—in particular, the strong autocorrelation of forward premiums.     

Family Structure and Family Earnings: The Determinants of Earnings Differences among Family Types

Mean total family earnings differ greatly by family structure (the number, age, and gender of adults, and the presence or absence of children and dependent elders). This study classifies families into seven major types by structure, and analyzes inequality in mean earnings among these types. Differences in mean earnings among types depend primarily on the amount of labor supplied to the labor market. The quantity of labor supplied, in turn, while reflecting in part differences in the head's characteristics (such as human capital), is largely determined by family structure. Earnings changes by family type over time from 1973 to 1987 are also discussed.     

Who Benefits from Public Utilities?*

We model the determination of output, factor payments and prices within publicly owned firms, assuming the firms are managed by utility-maximizing employees monitored by vote-maximizing politicians. The choice of a public monopoly to supply the output is most suited to further the redistributive aims of the politicians, but will also be favoured by employees who can capture some rents.     

Liquidity or Credit Risk? The Determinants of Very Short‐Term Corporate Yield Spreads

Employing a comprehensive database on transactions of commercial paper issued by domestic U.S. nonfinancial corporations, we study the determinants of very short‐term corporate yield spreads. We find that liquidity plays a role in the determination of spreads but, somewhat surprisingly, credit quality is the more important determinant of spreads, even at horizons of less than 1 month. These results are robust across a variety of proxies for liquidity and credit risk, and have important implications for the literature on the modeling of corporate bond prices.