# Costly Signaling **Domain:** Information economics and behavior **Doc Type:** Developed Concept Node **Maturity:** Developed **Collection:** [[collections/Gamification|Gamification Collection]] ## Definition A **costly signal** is an observable action whose cost differs across hidden types, making imitation difficult enough that the action can convey information. Cost alone is insufficient; credibility depends on the signal being differentially easier or more beneficial for the type it is supposed to identify. ## Significance Puzzles, credentials, endurance tests, donations, and security challenges can all function as signals. The collection asks whether a task proves the advertised trait, merely selects for persistence or resources, or becomes valuable work for the operator. [[articles/gamification/Lex Sportiva and Winning Without Bloodshed|Lex Sportiva and Winning Without Bloodshed]] extends the mechanism into settlement. A wager makes forecast confidence costly; a security tournament makes technical competence expensive to fake; staked capital, time-consuming performance, and a history of verified findings can each become a signal carried into later eligibility or task assignment. ## Sources - Nobel Prize, [Markets with asymmetric information](https://www.nobelprize.org/nobel_prizes/economic-sciences/laureates/2001/popular.html) ## Routes [[wiki/Michael Spence|Michael Spence]] · [[wiki/Tiering|Tiering]] · [[wiki/Gamified Elicitation and Selection|Gamified Elicitation and Selection]] · [[wiki/Priced Belief|Priced Belief]] · [[articles/gamification/Lex Sportiva and Winning Without Bloodshed|Lex Sportiva and Winning Without Bloodshed]]