Pulled Away or Pushed Out? Explaining the Decline of Teacher Aptitude in the United States
利用美国数据，分析教师能力下降的原因，探讨是其他行业吸引力增强（拉走）还是教师工作条件恶化（推出）所致。
Pulled Away or Pushed Out? Explaining the Decline of Teacher Aptitude in the United States by Caroline M. Hoxby and Andrew Leigh. Published in volume 94, issue 2, pages 236-240 of American Economic Review, May 2004