This paper addresses the problem of the normative evaluation of income tax systems and income tax reforms. While most of the existing criteria, framed in the utilitarian tradition, are uniquely based on information about individual incomes, this paper, building upon the opportunity egalitarian...

We propose an empirical model to estimate inequality of opportunity (IOp) among workers and to distinguish two different sources of inequality: (i) inequality in the labour attachment and (ii) inequality in the remuneration of each working hour. Considering working hours as a measure of effort,...