<P> In a stem family, a type of extended family, first presented by Frédéric Le Play, parents will live with one child and his or her spouse, as well as the children of both, while other children will leave the house or remain in it unmarried . The stem family is sometimes associated with inegalitarian inheritance practices, as in Japan and Korea, but the term has also been used in some contexts to describe a family type where parents live with a married child and his or her spouse and children, but the transfer of land and moveable property is more or less egalitarian, as in the case of traditional Romania, northeastern Thailand or Mesoamerican indigenous peoples . In these cases, the child who cares for the parents usually receives the house in addition to his or her own share of land and moveable property . </P> <P> In an extended family, parents and their children's families may often live under a single roof . This type of joint family often includes multiple generations in the family . From culture to culture, the variance of the term may have different meanings . For instance, in India, the family is a patriarchal society, with the sons' families often staying in the same house . </P> <P> In the joint family, the workload is shared among the members . The patriarch of the family (often the oldest male member) is the head of the household . Grandparents are usually involved in the raising process of the children along with guidance and education . Like any family unit the success and structure are dependent on the personalities of the individuals involved . </P> <P> Amy Goyer, AARP multigenerational issues expert, said the most common multigenerational household is one with a grandparent as head of household and his adult children having moved in with their children, an arrangement usually spurred by the needs of one or both to combine resources and save money . The second most popular is a grandparent moving in with an adult child's family, usually for care - giving reasons . She noted that 2.5 million grandparents say they are responsible for the basic needs of the grandchild living with them . </P>

Who is the single authority who rules a large group of diverse cultures