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Robert E. Burnkrant, Thomas J. Page, Jr., An Examination of the Convergent, Discriminant, and Predictive Validity of Fishbein's Behavioral Intention Model, Journal of Marketing Research, Vol. 19, No. 4, Special Issue on Causal Modeling (Nov., 1982), pp. 550-561
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Burnkrant et al. (1982) studied this question.
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