Using Electoral Cycles in Police Hiring to Estimate the Effect of Police on Crime: Comment
评论了利用警察招聘的选举周期来估计警察对犯罪影响的方法，指出原研究可能存在的计量问题，对相关领域研究者有参考价值。
Using Electoral Cycles in Police Hiring to Estimate the Effect of Police on Crime: Comment by Justin McCrary. Published in volume 92, issue 4, pages 1236-1243 of American Economic Review, September 2002