RETURN TO POULTRY RESEARCH IN UNITED STATES

[1] BARLETTA NA, 6423 AGR ECON RES PA

[2] FOX K, ECONOMETRIC ANALYSIS

[3] GRILICHES Z, 1964, AM ECON REV, V54, P961

[4] RESEARCH COSTS AND SOCIAL RETURNS - HYBRID CORN AND RELATED INNOVATIONS [J]. JOURNAL OF POLITICAL ECONOMY, 1958, 66 (05) : 419 - 431

[5] HODGES E, USDA79 PROD RES REP

[6] JENNINGS RD, USDA21 PROD RES REP

[7] GEOGRAPHIC-DISTRIBUTION OF RESEARCH COSTS AND BENEFITS [J]. JOURNAL OF FARM ECONOMICS, 1965, 47 (02): : 234 - 241

[8] NATIONAL PROGRAM RES

[9] 297 US DEP AGR STAT

[10] CENSUS AGRICULTURE, V1

[1] BARLETTA NA, 6423 AGR ECON RES PA

[2] FOX K, ECONOMETRIC ANALYSIS

[3] GRILICHES Z, 1964, AM ECON REV, V54, P961

[4] RESEARCH COSTS AND SOCIAL RETURNS - HYBRID CORN AND RELATED INNOVATIONS [J]. JOURNAL OF POLITICAL ECONOMY, 1958, 66 (05) : 419 - 431

[5] HODGES E, USDA79 PROD RES REP

[6] JENNINGS RD, USDA21 PROD RES REP

[7] GEOGRAPHIC-DISTRIBUTION OF RESEARCH COSTS AND BENEFITS [J]. JOURNAL OF FARM ECONOMICS, 1965, 47 (02): : 234 - 241

[8] NATIONAL PROGRAM RES

[9] 297 US DEP AGR STAT

[10] CENSUS AGRICULTURE, V1