We consider a monopolist expert offering a service with a 'credence' characteristic. A credence service is one where the customer cannot verify, even after purchase, whether the amount of prescribed service was appropriate or not; examples include legal, medical or consultancy services and car...

We study a single queue joining equilibrium when there is uncertainty in the consumers' minds about the service rate and value. Without such uncertainty, the joining equilibria are characterized by means of a single threshold queue length above which consumers do not join (Naor, 1969). We show...