An NBM is a market form in that it is made of institutions and business models. It arises in a particular context where abundant novelty issuing from the producer side meets substantial search costs and evaluation difficulties on the consumer side. In a NBM consumers don't necessarily know what they are searching for. These difficulties on the demand side are specifically caused by the fact that novel goods, which are experience goods, often require new "rules for choice" as new suites of evaluative criteria.