Heterogeneity of Long-History Migration Predicts Smiling, Laughter and Positive Emotion Across the Globe and Within the United States
P. M. Niedenthal, M. Rychlowska, M. Rychlowska, A. Wood, F. Zhao
The paper shows that historical migration diversity predicts higher smiling, laughter, and positive emotions globally and within the U.S., even after controlling for current diversity and economic factors.
bioRxiv · May 8, 2018Evolutionary Biology