The Lure of "Common Sense" Nudges: Blood Donor Edition

Quick: what happened to the blood you donated at last month’s office blood drive? If you’re like most people, this question is impossible to answer with any specificity. It went to a blood bank, you likely assume, and from there to a hospital where someone awaited a transfusion. But how long it took to get there, or even whether your donation was accepted in the first place, is impossible to know for sure.