A Theory of Rigid Extremists and Flexible Moderates with an Application to the U.S. Congress
构建了一个理论模型，区分刚性极端分子和灵活温和派，并用美国国会数据检验该理论，帮助理解政治决策中的行为差异。
A Theory of Rigid Extremists and Flexible Moderates with an Application to the U.S. Congress by S. Brock Blomberg and Joseph E. Harrington. Published in volume 90, issue 3, pages 605-620 of American Economic Review, June 2000