[This dissertation fundamentally investigates the ability and explanatory power of the parenting advantage concept to effectively manage business portfolios. It contributes to a largely ignored field of corporate strategy research : namely, the parenting role and valueadded strategies of corporate headquarters., This dissertation fundamentally investigates the ability and explanatory power of the parenting advantage concept to effectively manage business portfolios. It contributes to a largely ignored field of corporate strategy research : namely, the parenting role and valueadded strategies of corporate headquarters.]