Lee and Niederle were worried that participants might attach roses mainly to prospects that were strong matches, which would obviously lead to an increase in acceptance, unrelated to a rose’s signal value. So they also gave a lucky set of participants eight roses instead of two—unbeknownst to any of their potential partners—to see whether more roses alone would lead to better dating outcomes. Indeed, the participants who were randomly chosen to get eight roses got more dates than the two-rose participants, suggesting that the roses themselves helped in getting offers accepted.
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