@techreport{NBERw13264,
 title = "The Macroeconomic Effects of Tax Changes:  Estimates Based on a New Measure of Fiscal Shocks",
 author = "Christina D. Romer and David H. Romer",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13264",
 year = "2007",
 month = "July",
 URL = "http://www.nber.org/papers/w13264",
}