Bollerslev, T., and J. M.Woolridge. "Quasi-maximum likelihood estimation and inference in dynamic models with time-varying covariances." Econometric Reviews, 11 (1992), 143172
Explores the implication of adopting the form of the social welfare function in the measurement of inequality of individual income and its relationship to the conventional measures of inequality. Ranking of income distributions; Conditions for the ranking of income distributions; Difference in inequality between the post-tax income and pre-tax income distributions.