The Signal in an Expensive Suit
Written by Studio AM.
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Imagine two job applicants who claim to be reliable. One arrives in an expensive suit; the other wears plain clothes. The suit is visible, while reliability is hidden. An observer might treat the clothing as a signal of preparation or success. But does its price reveal the quality being sought?
In economics, a signal is useful when it carries information about something difficult to observe directly. Cost can matter because a signal that is easy for everyone to copy separates no one. Yet expense alone is insufficient. The cost must relate differently to the hidden quality. If excellent and poor applicants can rent the same suit with equal ease, the clothing may communicate convention or access rather than reliability.
Signals also depend on shared interpretation. A suit could indicate respect in one workplace and poor judgment in another where formal clothing interferes with the job. Receivers learn from context, past experience, and other evidence. They may update their beliefs without becoming certain.
The example reveals why “costly signal” does not mean “expensive object that proves worth.” A credible signal is hard for a less qualified sender to produce or maintain relative to a more qualified one. Even then, it offers evidence, not a guarantee. Wise judgment asks what creates the cost, who can bear it, and whether the signal connects to the quality under review.
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Questions
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Question 1 of 4
What is the main idea of the passage?
The answer is C: A costly signal is informative only when its cost and context connect meaningfully to a hidden quality.
The suit example is repeatedly qualified by copyability, connection to quality, context, and uncertainty.
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Question 2 of 4
Why does equal access to renting the suit weaken it as a signal of reliability?
The answer is D: Applicants with different levels of reliability can produce the same visible display just as easily.
A signal separates types only if producing it differs with the hidden quality; equal ease removes that separation.
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Question 3 of 4
What does “credible” mean in the final paragraph?
The answer is A: believable because it provides relevant evidence
The paragraph calls a signal credible when it is harder for a less qualified sender to produce, while still denying certainty.
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Question 4 of 4
What hidden quality is used in the opening example?
The answer is B: reliability
The opening contrasts the suit's visible price with the applicants' claimed reliability, which cannot be seen directly.
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