In some cities the majority of the population rent, elsewhere it is a minority. Unfortunately, rental statistics are often confusing because few countries distinguish accurately between rental housing and other forms of non-ownership, such as sharing or borrowing someone’s home. Sometimes the distinction between renting and sharing is hard to make, especially in countries where extended family households are common. Relatives and grown-up children, sometimes with families of their own, live in the family home. Payment can take several forms; sometimes they pay rent, sometimes they contribute to household costs and sometimes they pay nothing at all.