The relative merits of different methods of measuring volume of retail sales of particular commodities has been a debated subject in recent years. As a byproduct of an experiment in retail store merchandising, a direct comparison of some alternative methods is made in this paper, a matter of...

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...