托福口语 Task 3

The concept of 'signaling' in economics refers to the actions taken by individuals or firms to convey information about their qualities or intentions to others, especially in situations where information is asymmetric. Signaling is costly, but the cost is justified because it helps reduce uncertainty and enables more efficient exchanges. A classic example is a job applicant obtaining a degree to signal their intelligence and work ethic to potential employers, even if the degree itself does not directly teach job-relevant skills.

Professor: Let me give you a real-world example from the used car market. Suppose you own a very reliable, well-maintained car and want to sell it. Buyers can't easily tell if your car is a 'lemon' or a 'peach' just by looking at it. So you decide to get a comprehensive inspection report from an independent mechanic and provide a detailed maintenance history. This costs you time and money, but you do it because it signals to buyers that your car is of high quality. As a result, you can ask for a higher price, and buyers are more willing to trust you. In contrast, a seller with a poorly maintained car would not spend that money, because the inspection would reveal problems and hurt their sale. So the signal works because it is credible and costly to fake.