1. Alvaredo, F., Piketty, T., Saez, E., Chancel, L. & Zucman, G. (2018). World inequality report 2018. Post-Print, HAL. https://EconPapers.repec.org/RePEc:hal:journl:halshs-01885458
2. When money does not buy happiness: The case of “frustrated achievers”
3. Belk, R. W. (1984). Three scales to measure constructs related to materialism: Reliability, validity, and relationships to measures of happiness. In T. C. Kinnear (Ed.), NA - Advances In Consumer Research (Vol. 11, pp. 291–297). Association for Consumer Research.