//-->
Accounting for the Impact of Public Research, R&D Spill-ins, Extension and Roads in U.S. Regional Agricultural Productivity Growth, 1980–2004
Wang, Sun Ling, (2012)
Rates of Returns to Public Agricultural Research in 48 U.S. States
Plastina, Alejandro, (2012)
Theory and Measurement of Producer Response Under Quotas (The)
Fulginiti, Lilyan E., (1993)