Institution: | a Department of Agricultural and Resource Economics, 212B Ballard Extension Hall, Oregon State University, Corvallis, OR 97331-3601, USA;b US Department of Agriculture, Economic Research Service, 1800 M St NW, Room S4189, Washington, DC 20036-5831, USA;c John F. Kennedy School of Government, Harvard University, 79 John F. Kennedy Street, Room L-306, Cambridge, MA 02138, USA |