@techreport{NBERt0344,
 title = "Bootstrap-Based Improvements for Inference with Clustered Errors",
 author = "A. Colin Cameron and Jonah B. Gelbach and Douglas L. Miller",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Technical Working Paper Series",
 number = "344",
 year = "2007",
 month = "September",
 URL = "http://www.nber.org/papers/t0344",
}