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A "purchasing cooperative" is a type of cooperative arrangement, often among businesses, to agree to aggregate demand to get lower prices from selected suppliers. Retailers' cooperatives are a form of purchasing cooperative. Cooperatives are often used by government agencies to reduce costs of procurement. Purchasing Cooperatives are used frequently by governmental entities, since they are required to follow laws requiring competitive bidding above certain thresholds. In the United States, counties, municipalities, schools, colleges and universities in the majority of states can sign interlocal agreements or cooperative contracts that allow them to legally use contracts that were procured by another governmental entity.
- Choice Facility Partners, a facility services cooperative 
- Gulf Coast Cooperative, a food cooperative primarily serving schools, and
- HCDE Purchasing Cooperative, offering more than 275 vendor contracts for commodities.
Various schools, colleges and universities, municipalities, counties, municipal utility districts and other governmental entities sign an interlocal contract with HCDE, thus becoming members that can access any of the multitude of competitively bid and legally awarded contracts available through their cooperatives. To optimize processes, these three cooperatives were combined into Choice Partners national cooperative in 2012.
Missouri State Statutes (Chapter 34, Chapter 37 and Chapter 67) authorize the State's Division of Purchasing to conduct a cooperative purchasing program, and allow eligible local governments, political subdivisions, and quasi-public governmental bodies to participate in the program.
- Parish Business Managers Association, PBMA - Cooperative Purchasing Effort (COPE) Formally Initiated, published June 2013, accessed 23 December 2020
- State of Missouri, Office of Administration, Division of Purchasing, Cooperative Procurement Program, accessed 23 December 2020