According to Pew's Pursuing the American Dream, such individuals are almost five times likelier to escape the lowest income quintile as adults if they obtain a bachelor's degree. (educationnext.org)
A t the beginning of kindergarten, the math and reading achievement gaps between children in the bottom and top income quintiles amount to more than a full standard deviation. (semanticscholar.org)
-- Difference between top and bottom income quintiles in the proportion of household expenditures spent on transportation; (sciencedaily.com)