We extend relational demography theory by introducing kinship as a new demographic characteristic of categorization. We theorize that family firm employees’ kinship similarity (family vs. nonfamily), kinship tie (child vs. other familial relationship), and gender (female vs. male) uniquely affect their organizational citizenship behavior (OCB). Data collected from 209 family CEO–employee dyads indicate that male family employees, especially sons of the CEO, display the highest OCB when altruistic leadership behavior is high, whereas daughters and other female family employees display consistently high OCB, confirming that employees’ experiences in family firms are simultaneously shaped by their kinship characteristics and gender.

通过引入亲属关系作为分类的新人口统计学特征，我们扩展了关系人口统计学理论。我们认为，家族企业雇员的亲属相似性（家庭与非亲戚关系），亲属关系（孩子与其他家族关系）和性别（女性与男性）对他们的组织公民行为（OCB）具有独特的影响。从209个家族CEO-雇员双子座收集的数据表明，当利他式领导行为很高时，男性家族雇员，尤其是CEO的儿子，OCB最高，而女儿和其他女性家族雇员则始终表现出较高的OCB，这证实了员工的亲身经历。家族企业同时受到亲属特征和性别的影响。