@article{Easterlin2010,
author = {Easterlin, R.A. and McVey, L.A. and Switek, M. and Sawangfa, O. and Zweig, J.S.},
title= {The happiness-income paradox revisited},
year = {2010},
doi = {10.1073/pnas.1015962107},
volume = {107},
pages = {22463‒22468},
}