Matthew A. Killingsworth, Daniel Kahneman, and Barbara Mellers in PNAS:
Can money buy happiness? Two authors of this article have published contradictory claims about the relationship between emotional well-being and income. We later agreed that both studies produced valid results and that it was our responsibility to search for an interpretation that explains both findings. We engaged in an adversarial collaboration and asked Barbara Mellers to be the facilitator. This article reports the outcome of our work.