TY - BOOK AU - Costa,Dora L. TI - Unequal at birth : a long-term comparison of income and birth weight AV - HQ1381 C677U PY - 1997/// CY - Cambridge, Mass PB - National Bureau of Economic Research KW - BIRTH WEIGHT KW - ECONOMIC ASPECTS KW - UNITED STATES KW - HISTORY KW - INFANTS KW - MORTALITY KW - POOR CHILDREN KW - HEALTH AND HYGIENE KW - INCOME DISTRIBUTION KW - HEALTH ASPECTS ER -