For a car he had purchased on the prior weekend, he would place an ad in the Sunday paper. Because he knew how to construct a good ad, he usually received an array of calls from potential buyers on Sunday morning. Each prospect who was interested enough to want to see the car was given an appointment time—the same appointment time. So if six people were scheduled, they were all scheduled for, say, two o’clock that afternoon. This little device of simultaneous scheduling paved the way for later compliance because it created an atmosphere of competition for a limited resource.
