@techreport{NBERw13266,
 title = "Greenhouse Gas Reductions under Low Carbon Fuel Standards?",
 author = "Stephen P. Holland and Christopher R. Knittel and Jonathan E. Hughes",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13266",
 year = "2007",
 month = "July",
 URL = "http://www.nber.org/papers/w13266",
}