Card, David E. - National Bureau of Economic Research (NBER) - 2009
inequality, focusing on evidence from cross-city comparisons in the U.S. Although some researchers have argued that a cross … school education are perfect substitutes for those with a high school education; (2) "high school equivalent" and "college … equivalent" workers are imperfect substitutes; (3) within education groups, immigrants and natives are imperfect substitutes …