Economists from the University of Warwick, central England, and from Dartmouth College, New Hampshire, looked at data on the mental health of two million people from 80 countries.

• 英格兰中部沃维克大学和美国新罕布什尔州达特茅斯学院的经济学家们对80个国家的200万人的心理健康数据进行了研究分析。