Using data from the Health and Retirement Study (HRS) and linked administra
tive I cords, we explore differences in old-age benefits between men and wo
men attributable to differences in length of work life and pay. We find tha
t most women are fully insured for Social Security purposes, but those who
are not would have to work substantially more to become eligible. Among tho
se who are eligible, additional work would translate into only slightly hig
her benefits.