The family members feel secure in the presence of the karta. The authority of the family is passed on by the law of primogeneture. After the death of the karta, his eldest son becomes the karta and take charge of the family. The joint family in India is very unique. It has various positive and negative aspects. With globalization, increasing urbanization people have become more individualistic and consider family secondary. 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. Amy Goyer, AARP multigenerational issues expert, said the most common multigenerational household is one with a grandparent as head of the 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. The house often has a large reception area and a common kitchen. Each family has their own bedroom. The members of the household also look after each other when a member is ill. It has often been presumed that extended family groups sharing a single household enjoy certain advantages, such as a greater sense of security and belonging due to sharing a wider pool of members to serve as resources during a crisis, and more role models to help perpetuate desired behavior and cultural values. However, even in cultures in which adults are expected to leave home after marriage to begin their own nuclear-based households, the extended family often forms an important support network offering similar advantages. Particularly in working-class communities, grown children tend to establish their own households within the same general area as their parents, aunts, uncles, and grandparents. These extended family members tend to gather often for family events and to feel responsible for helping and supporting one another, both emotionally and financially. While contemporary families may be considered more mobile in general than in the past, sociologists find that this has not necessarily resulted in the disintegration of extended family networks. Rather, technological aids such as the Internet and social networking sites such as Facebook are now commonly used to retain contact and maintain these family ties.