@article{Yang2008,
author = {Yang, Y.},
title= {Social inequalities in happiness in the United States, 1972 to 2004: An age-period-cohort analysis},
year = {2008},
doi = {10.1177/000312240807300202},
journal = {American Sociological Review},
volume = {73},
number = {2},
pages = {204--226},
}