This article offers a historical analysis of American interwar agricultural economists and their interest in information. Believing that the main problem facing farmers was a lack of information, agricultural economists designed an information policy aiming to produce, format, and disseminate information. Using administrative archives, the article analyzes the motivations of these economists and the implementation of this policy. As the article shows, the policy was a prerequisite for theoretical discussions about information, and it established institutional tools that are still used today, such as the USDA market news service.