it focuses on the area of tax policies labour market and product market policies nonpolicy factors such as up skilling globalisation and technological change are also covered albeit more succinctly section wraps up the empirical findings by classifying policy reforms on the basis of their joint effects on gdp per capita and household disposable incomes across the distribution for each country and each year the database covers mean disposable income by deciles ie the population is sliced in ten equally sized groups ranked by income allowing direct computation of income standards see box