Universal modesty in signal-burying games

Research output: Contribution to journalArticlepeer-review

Abstract

Why would individuals hide positive information about themselves? Evolutionary game theorists have recently developed the signal-burying game as a simple model to shed light on this puzzle. They have shown that the game has an equilibrium where some agents are better off deliberately reducing the visibility of the signal by which they broadcast their positive traits. However, this equilibrium also features individuals who fully broadcast their positive traits. Here, we show that the signal-burying framework can also explain modesty norms that everyone adheres to: the game contains an equilibrium where all agents who send a signal voluntarily reduce its conspicuousness. Surprisingly, the stability of the two kinds of equilibria rely on very different principles. The equilibrium where some agents brag is stable because of costly signalling dynamics. By contrast, the universal modesty equilibrium exists because buried signals contain probabilistic information about a sender’s type, and receivers make optimal use of this information. In the latter equilibrium, burying a signal can be understood as a handicap which makes the signal more honest, but honesty is not achieved through standard costly signalling dynamics.
Original languageEnglish
Article number20190985
Number of pages8
JournalProceedings of the Royal Society B: Biological Sciences
Volume286
Issue number1906
Early online date3 Jul 2019
DOIs
Publication statusPublished - 10 Jul 2019

Keywords

  • evolutionary game theory
  • signalling
  • agent-based model

Fingerprint

Dive into the research topics of 'Universal modesty in signal-burying games'. Together they form a unique fingerprint.

Cite this