The evolution of Horn's ruleJournal of Economic Methodology, 2008, vol. 15, issue 3, pages 275-284 Abstract: Horn's rule says that messages can be kept ambiguous if only a single interpretation is plausible. Speakers only perform costly disambiguation to convey surprising information. This paper shows that, while non-cooperative game theory cannot justify Horn's rule, evolutionary game theory can. In order to model the evolution of signalling, the pooling equilibrium needs to be one's starting point. But in such an equilibrium, the plausible interpretation is made, and the receiver is therefore already predisposed to interpret absence of a signal as referring to a plausible event. From there on, a marked signal referring to an implausible event can evolve. At the same time, the paper identifies an exception to Horn's rule. If giving a plausible interpretation for an implausible event is very costly, then in the pooling equilibrium the implausible interpretation is always made. In this exceptional case, only an inefficient separating equilibrium disobeying Horn's rule can evolve. Keywords: Horn's rule; signalling; evolutionary game theory; evolutionary drift; pragmatics (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: http://EconPapers.repec.org/RePEc:taf:jecmet:v:15:y:2008:i:3:p:275-284 Ordering information: This journal article can be ordered from Access Statistics for this article Journal of Economic Methodology is edited by Mark Blaug More articles in Journal of Economic Methodology from Taylor and Francis Journals |
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