@inbook{NBERc12110,
 Crossref = "NBERperl10-1",
 title = "Supply and Effects of Specialty Crop Insurance",
 author = "Ethan Ligon",
 BookTitle = "The Intended and Unintended Effects of U.S. Agricultural and Biotechnology Policies",
 Publisher = "University of Chicago Press",
 pages = "113-142",
 year = "2011",
 month = "March",
 URL = "http://www.nber.org/chapters/c12110",
}
@book{NBERperl10-1,
 title = "The Intended and Unintended Effects of U.S. Agricultural and Biotechnology Policies",
 author = "Joshua S. Graff Zivin and Jeffrey M. Perloff",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2012",
 URL = "http://www.nber.org/books/perl10-1",
}