January 1994
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Marketing Research
Published in Marketing Research: A Magazine of Management and Applications In short, it sometimes will be cheaper and more accurate to combine the results of two different sampling methods. Dual sampling frames may be an attractive option when a researcher wants to combine two types of estimates: * Precise estimates, which are derived from a large sample, usually obtained using an inexpensive sampling frame characterized by incomplete coverage, such as a mailing list. * Unbiased estimates, which usually are obtained from an expensive sampling frame characterized by complete coverage, such as probability sample (e.g., an area sample). The methods for combining; the estimates from two sampling frames are well-documented in the academic literature on sampling techniques. Yet, although these methods have been used by survey statisticians to design government studies, they are seldom used in marketing. This article explains how to combine them in a simple way that a manager might use.