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  1. […] Marketing research based on observations is called experimental technique and ethnographic studies. Test markets and purchase laboratories are examples of experimental techniques. The quantity measured is determined by understanding the factors that are responsible for the success of a product and then one or some of the factors are changed and the result is observed.  In ethnographic studies observations are done longitudinally or done at several instances of time or cross-sectional, or done at only a particular time. […]

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