The purpose of this note is to propose a decomposition of the Gini index of inequality into within and between subpopulations using the Lerman-Yitzhaki covariance method. The present method suggests that once the population is arranged in ascending order of income and assigned ranks, the same ranks will be used to calculate total as well as between inequality. In this way, it differs from the one suggested by Jacques Silber (1989) in the measurement of between inequality and, thereby, in the interaction term.

Keith R. Ihlanfeldt, Madelyn V. Young, Intrametropolitan Variation in Wage Rates: The Case of Atlanta Fast-Food Restaurant Workers, The Review of Economics and Statistics, Vol. 76, No. 3 (Aug., 1994), pp. 425-433

This paper proposes a method for measuring the effects of substitutions in the timing of recreational use on people's willingness to pay for nonmarketed resources. Using the three markets (peak, pre-peak, and post-peak) for weekly rentals of vacation properties along the Outer Banks of North Carolina, we are able to control for changes in the mix of site characteristics selected at different times and estimate the effects of temporal substitution on tradeoffs between other characteristics. Proximity to the ocean was found to be a significant determinant of temporal substitution between the peak and pre-peak seasons with ocean front properties having 1.9 percent to 4.7 percent smaller discounts for preseason rentals relative to other properties.