+**B40** refers to the bottom 40% of households classified by income within a national economy. This [Income Group](/wiki/income_group) often experiences [Economic Disadvantage](/wiki/economic_disadvantage) and is a primary focus for social welfare initiatives aimed at reducing poverty.
+## See also
+- [Poverty Line](/wiki/poverty_line)
+- [Social Welfare](/wiki/social_welfare)
+- [Wealth Gap](/wiki/wealth_gap)
... 1 more lines