A survey of 164 recent purchasers of color television sets shows that consumer beliefs about the marketplace and about their capabilities as consumers accounted for 50% of the variance in extent of external search. Also, the type of brand (domestic, foreign, or private) and the type of store (national, regional, or local) considered by a consumer are found to be significantly related to the beliefs held.
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Duncan et al. (1982) studied this question.
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