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Over the last few years several groups have experimented with the use of "observation" techniques for measuring the retail movement of fresh produce during a short period of time—a few days or a week. Some investigators have stated that the observation technique offers unique statistical as well as collection advantages. The present investigation was undertaken to compare the relative efficiency of the observation technique with the standard retail audit method, and to develop an efficient system of using observation techniques for measuring retail sales. This study, involving only apples and pears, was conducted in Philadelphia by Audits and Surveys Company, Inc., under contract with the Agricultural Marketing Service.


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