There are 23588 results for: content related to: Joshua S. Graff Zivin and Jeffrey M. Perloff (Eds.), The Intended and Unintended Effects of U.S. Agricultural and Biotechnology Policies. A National Bureau of Economics Research Conference Report . Chicago and London : University of Chicago Press , 2012 , 298 pp., ISBN: 978-0-226-98803-0, $99.00.