“…The first is whether the woman has any surviving brother and the second is whether the woman has any surviving sister. Under the patrilineal and patrilocal extended family model in China, elderly persons are expected to live with adult sons and their wives (Sun 2002;Whyte 2005;Whyte and Xu 2003), while matrilocal coresidence -parents coresiding with their married daughter -is also becoming more prevalent in China (Chu, Xie, and Yu 2011). Thus women's possibility of coresidence with parents will be greatly reduced if they have a brother, and, to a lesser extent, if they have a sister (Zhang, Gu, and Luo 2014).…”