Inequality decomposition by factor components is extended to the Mehran
and Piesch indices, comparing them with the decomposition of the Gini index,
the squared coefficient of variation and the Theil's T coefficient. The
decomposition procedure is applied to the distribution of per capita
household income in Brazil in 1999, considering six components: earnings of
civil servants and military personnel, earnings of other employees, earnings
of self-employed workers, earnings of employers, pensions and, finally, all
other incomes. One of the results is that for all the five measures used,
the concentration ratio of pensions is higher than the overall index of
inequality, indicating that this component is contributing to the increase
in income inequality.