The Data Used for the Impact Studies .U.S.farm-level data are obtained from the Agricultural Resource Management Survey (ARMS)developed and carried out by the USDA. ARMS is the major source of integrated information on production practices,acreage planted and harvested,resource use,and financial conditions among U.S.farms,as well as the characteristics of farm households. Most biotech studies are based on 1997-2001 survey data ●● ●●● ●●● The Data Used for the Impact Studies ♦ U.S. farm-level data are obtained from the Agricultural Resource Management Survey (ARMS) developed and carried out by the USDA. ♦ ARMS is the major source of integrated information on production practices, acreage planted and harvested, resource use, and financial conditions among U.S. farms, as well as the characteristics of farm households. ♦ Most biotech studies are based on 1997-2001 survey data