D. Johnson et S. Shipp, TRENDS IN INEQUALITY USING CONSUMPTION-EXPENDITURES - THE US FROM 1960 TO 1993, The Review of income and wealth, (2), 1997, pp. 133-152
While much of the evidence suggests that there was an increase in ineq
uality in the U.S. during the 1980s, the reasons are less evident. Usi
ng the U.S. Consumer Expenditure Survey data, we find that the inequal
ity of consumption-expenditures, as well as the inequality of other me
asures of resources, widened considerably during the 1980s. While prev
ious studies suggest that increasing inequality is mainly due to incre
ases in within group inequality, we show that by decomposing inequalit
y by the interaction of family type and education almost three-fourths
of the increase in inequality is accounted for by changes in inequali
ty between groups and by shifts in the population.