We analyze a situation where an antitrust authority delegates to an audit inspectorthe mission of gathering the su¢cient information to condemn a cartel. The authorityhas two instruments at her disposal: rewarding the inspector with a proportion of thecollected …ne or providing him with...

We consider a search-matching model in which black workers are discriminated againstand the job arrival rates of all workers depend on social networks as well as distance to jobs.Location choices are driven by the racial preferences of households (both blacks and whites)consciously choosing to...