- Aknin, L.B.; Norton, M.I.; Whillans, A.V.
- Happiness and Prosocial Behavior: An Evaluation of the Evidence
- Helliwell, J.F et al (Eds), World Happiness Report 2019, Chapter 4
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no new data on present happiness.