@article{McGarry2000,
author = {McGarry, K. and Schoeni, R.F. },
title= {Social security, economic growth, and the rise in elderly widows’ independence in the twentieth century},
year = {2000},
doi = {10.2307/2648124},
journal = {Demography},
volume = {37},
number = {2},
pages = {221−236},
}