@techreport{NBERw13799,
 title = "Estimating the Impact of Climate Change on Crop Yields: The Importance of Nonlinear Temperature Effects",
 author = "Wolfram Schlenker and Michael Roberts",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13799",
 year = "2008",
 month = "February",
 URL = "http://www.nber.org/papers/w13799",
}