@article{Headey2010,
author = {Headey, B. and Muffels, R. and Wagner, G.G.},
title= {Long-running German panel survey shows that personal and economic choices, not just genes, matter for happiness},
year = {2010},
doi = {10.1073/pnas.1008612107},
volume = {107},
pages = {17922‒17926},
}