Intergenerational mobility is a concept relative to intragenerational mobility. Both are important topics in the field of social mobility. Sorokin argues that if the starting point of an individual’s social position is defined as his/her initial position, and the end point of an individual’s social position is defined as his/her current position, then the core issue of this kind of studies is concerned about is what factors affect individuals’ current social statuses. By comparing the impact of both pre-endowed and self-motivated factors, we can also identify the degree of openness of a society. This kind of studies can be called studies of intragenerational mobility. If the starting point of an individual’s social position is defined as his/her social origin, and the end point of an individual’s social position is defined his/her initial position or current position, then this kind of studies focuses on the relationship between fathers’ social statuses and children’s social statuses, or in other words, and on whether fathers’ social positions can be transmitted to children’s, i.e., father’s transmission effect or children’s inheritance effect. This kind of studies is called studies of intergenerational mobility (Sorokin, 1927: 106).