In an elegant paper looking into the performance of German fighter pilots in the second world war, Philipp Ager of the University of Mannheim and other researchers found that personal rivalry fuelled risk-taking behaviour.

曼海姆大学的菲利普·阿格尔和其他研究人员在一篇研究二战期间德国战斗机飞行员表现的出色论文中发现，个人竞争助长了冒险行为。