TY - GEN digital ID - 131084571 TI - Income schooling and ability: evidence from a new sample of identical twins AU - Ashenfelter, Orley AU - Rouse, Cecilia PY - 1997 PB - Cambridge, Mass. National Bureau of Economic Research DB - UniCat KW - Income KW - United States of America UR - https://www.unicat.be/uniCat?func=search&query=sysid:131084571 AB - ER -