@article{Duncan1990,
author = {Duncan, G.J. and Hoffman, S.D.},
title= {Welfare Benefits, Economic Opportunities, and Out-of-Wedlock Births Among Black Teenage Girls},
year = {1990},
doi = {10.2307/2061568},
journal = {Demography},
volume = {27},
number = {4},
pages = {519--535},
}