[1] Univ Southern Calif, Leonard Davis Sch Gerontol, Los Angeles, CA 90007 USA
[2] Univ Western Ontario, Dept Sociol, London, ON, Canada
[3] Syracuse Univ, Dept Sociol, Syracuse, NY USA
[4] Syracuse Univ, Aging Studies Inst, Syracuse, NY USA
[5] Univ Texas Austin, Dept Sociol, Austin, TX 78712 USA
[6] Univ Texas Austin, Populat Res Ctr, Austin, TX 78712 USA