Consumer cooperative is a form of trade. It emerged in the century before last as an association (consumer association) through the merger of consumers to collectively buy food in order to be able to buy more cheaply through large quantities. This gave rise to the “Coop”, which was not very successful under union leadership and is now of little importance. There are still Coop shops in individual federal states and states (Switzerland).
See also "contact point analysis" and "customer satisfaction measurement"