The impact of the Cooperative Extension System, which is celebrating its centennial this year, has been great, but is hard to quantify in relationship to other agricultural research and development activities, according to an article in Choices, the publication of the Agricultural and Applied Economics Association.

▪ Choices— Cooperative Extension System: Trends and Economic Impacts on U.S. Agriculture
▪ USDA National Institute of Food and Agriculture — 100 Years of Cooperative Extension