TY - JOUR A1 - Hertwig, R. A1 - Davis, J.N. A1 - Sulloway, F.J. T1 - Parental investment: How an equity motive can produce inequality Y1 - 2002 DO - 10.1037/0033-2909.128.5.728 JF - Psychological Bulletin VL - 128 IS - 5 SP - 728 EP - -745 ER -