B.1 Collecting Labels from Amazon Mechanical Turk

perceives utilities of U( R A )-tx from product A and U R B -t(1-x) from product B. Therefore, the sales of product A, denoted as x A , is x A = a( R A - R B ) 2t + 1 2 . Considering the demand substitution effect (i.e., an increase in R B is more likely to shift purchase from product A to product B), x A decreases in R B . ................
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