The experiment showed how ‘honest’ people were regarding payment via an honor-system in percentage of receivables collected. Restated, each day Paul Feldman delivered bagels and a wooden box for payment collection, and he’d come around again at noon to collect the wooden box of payments. Naturally, payment rates were not 100%. However, he did end up collecting at or above a rate of 87%. The YouTube video above at the 1:37 mark shows that after 9/11, Feldman saw payment rates increase by 2% and they remained elevated for at least 3-4 years until the book’s initial printing.