Key points are not available for this paper at this time.
Sachin Gupta, Pradeep Chintagunta, Anil Kaul, Dick R. Wittink, Do Household Scanner Data Provide Representative Inferences from Brand Choices: A Comparison with Store Data, Journal of Marketing Research, Vol. 33, No. 4 (Nov., 1996), pp. 383-398
Gupta et al. (Fri,) studied this question.