The aggregate approach to the evaluation ofproduction oriented expenditure in the UnitedStates has consistently shown high rates ofreturn to agricultural research investments.These efforts, while showing the value of agricultural research, are limited in the information they can provide policy...

The aggregate approach to the evaluation of production oriented expenditure in the United States has consistently shown high rates of return to agricultural research investments. These efforts, while showing the value of agricultural research, are limited in the information they can provide...