Some issues have also a specific title: Recent evolution of the Canadian and American populations (1990) ; The sandwich generation : myths and reality (1994) ; Demographic similarities and differences between Ontario and Quebec (1995) ; Common-law unions in Canada at the end of the 20th century (1996) ; Effects of the social environment of elderly persons on their socio-economic condition (1997) ; The fertility of immigrant women and their Canadian-born daughters (2002).