the data are collected at the oecd tl territorial level corresponding to nuts regions in europe and to large administrative subdivisions eg mexican states for noneuropean countries first they complement international assessments of differences across regions in living conditions oecd by providing comparable measures of differences in household incomes and poverty levels between regions second they can support the analysis of the levels and implications of income inequality in each region by documenting how household income is distributed within regions and how many people are poor relatively to the typical citizen of their region