Another advantage is the flexibility of breaking the working population of a country into different skill levels within sectors which allows capturing different facets of wage inequality such as within-country and within sector inequality as well as global inequality. Only wage-income inequality can be captured therefore missing important effects related to unemployment, informality, unincorporated businesses, and wealth transfers, amongst other things. Omitting wealth transfers in the calculation of measures of inequality can have consequences and these are particularly important at the top end of the income distribution (see Piketty, 2014).