We would rather make less money than see others make more

Bazerman, M. H., Loewenstein, G. F. & White, S. B. (1992). Reversals of Preference in Allocation Decisions: Judging an Alternative Versus Choosing Among Alternatives. Administrative Science Quarterly, Vol. 37, No. 2.

Money makes us happier only via status differential

Boyce, C. J., Brown, G. & Moore, S. (2010). Money and Happiness: Rank of Income, Not Income, Affects Life Satisfaction. Psychological Science, Vol. 21, No. 4, 471-75.

Monkeys hate neighbors who get more

Brosnan, S. F. & de Wall, F. (2003). Monkeys reject unequal pay. Nature, Vol. 425.

We are happier near visible poverty

Firebaugh, G. & Schroeder, M. (2009). Does Your Neighbor’s Income Affect Your Happiness?. American Journal of Sociology, 115 (3), 805-831.

Wealthy neighbors decrease our happiness

Haushofer, J., Reisinger, J. & Shapiro, J. (2015). Your Gain Is My Pain: Negative Psychological Externalities of Cash Transfers.

We are happy to make little money if others make even less

Solnick, A. & Hemenway, D. (1998). Is more always better?: A survey on positional concerns. Journal of Economic Behavior & Organization, Vol. 37, 373-383.

Others’ pain is our biological euphoria

Takahashi, H., Kato, M., Matsuura, M., Mobbs, D., Suhara, T. & Okubo, Y. (2009). When your gain is my pain and your pain is my gain: neural correlates of envy and schadenfreude. Science, 323 (5916), 937-39.

A selection of the best American PISIS murder videos