Signalling splits into common and conflict of interest

Game-theoretic signalling research divides into two camps: common-interest signalling, where sender and receiver want the same thing (and which explains why signalling is ubiquitous, down to bacteria and plants, because coordination requires transmitting information), and conflict-of-interest signalling, where sender and receiver interests may diverge (as in job-market hiring where every candidate wants to be hired regardless of quality).