Leopold Center for Sustainable Agriculture, Economics
This analysis found that Iowa's 160 farmers' markets attracted at least 135,000 people and generated $20 million for the Iowa economy in 2004.
Iowa State University
Otto, Daniel and Varner, Theresa, "Consumers, Vendors, and the Economic Importance of Iowa Farmers’ Markets: An Economic Impact Survey Analysis" (2005). Leopold Center Publications and Papers. 145.