Ambiguous Contracting: Natural Language and Judicial Interpretation

We study the relationship between ambiguity (which comes into the picture since contracts have to be written in natural language), and contractual incompleteness. The contracting process is modelled as a signalling game between the parties and the judge, with the contract as the signal. The judge is assumed to be bound by the content of the contract (in as far as it can be ascertained unambiguously). Two kind of examples are presented: The ...rst set of examples shows how ambiguity can lead to incompleteness. Here incompleteness is a way of hedging against adverse judgements on the part of an imperfectly informed judge. The remaining example illustrates a sort of converse intuition: It shows how incompleteness might lead the contracting parties to write ambiguous contracts in order to a¤ord a relatively well-informed judge freedom to enforce the parties’will.