TY - CHAP A1 - Sulloway, F.J. T1 - Birth order, sibling competition, and human behavior Y1 - 2001 A3 - Holcomb, H.R. T2 - Conceptual Challenges in Evolutionary Psychology: Innovative Research Strategies CY - Dordrecht and Boston PB - Kluwer Academic Publishers SP - 39 EP - -83 ER -