TY - JOUR A1 - Borgerhoff Mulder, M. T1 - Brothers and sisters: How sibling interactions affect optimal parental allocations Y1 - 1998 DO - 10.1007/s12110-998-1001-6 UR - https://doi.org/10.1007/s12110-998-1001-6 VL - 9 IS - 2 ER -