The main interpretation issue with relative poverty lines is that poverty rates based on them may remain constant or even fall if all households (including the poorest ones) experience a decline in their incomes . Moreover, people identified as poor in one country might not be considered poor in another, given the substantial differences in median incomes across OECD countries. Figure 5 shows the interregional dispersion of poverty headcounts w ith the poverty line defined at 60% of the national median income.