Signaling & Costly Signaling Theory
Amotz Zahavi / Michael Spence · 1973
"Zahavi and Spence showed signals become credible only when they are costly enough that faking them would not pay — so reliable signaling is about burning resources you couldn't afford to burn if you were lying."
Zahavi watched Arabian babblers make extravagant, dangerous displays to signal status — wasting energy precisely to prove they could afford to waste it.
Cheap talk is free, so it carries no information; a costly signal — a peacock's tail, a pricey degree, a startup's funded runway, a crisp rejection-free write-up — is credible because a weaker type couldn't profitably mimic it. Spence formalized this for job markets: education signals ability not primarily through content learned but through the differential cost of completing it. Design implication: if you want to be believed, don't explain harder, pay a cost your imitator couldn't bear.
What makes a signal credible under costly signaling theory?
Read more about the topic
The explanation above is written with AI assistance. These are the originals — go to them to check it.
- Job Market Signaling (Spence, 1973)Michael Spence / Wikipedia
Chicken & Brinkmanship
"The game of Chicken models situations where each side wins most by not swerving, but mutual non-swerving is catastrophic — so the art is credibly committing to not swerving while leaving the opponent a face-saving exit."