@inbook{NBERc12047,
 Crossref = "NBERlern10-1",
 title = "Cap-and-Trade, Emissions Taxes, and Innovation",
 author = "Suzanne Scotchmer",
 BookTitle = "Innovation Policy and the Economy, Volume 11",
 Publisher = "University of Chicago Press",
 pages = "29-53",
 year = "2011",
 month = "March",
 URL = "http://www.nber.org/chapters/c12047",
}
@book{NBERlern10-1,
 title = "Innovation Policy and the Economy, Volume 11",
 author = "Josh Lerner and Scott Stern",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2010",
 URL = "http://www.nber.org/books/lern10-1",
}