Food safety economists have raised numerous questions according to the emergence and the multiplication of safety quality management system within the food supply chain. However, few research deal with the voluntary implementation by firms of these systems (Segerson, 1999; Venturini, 2003; Noelke-...

Following the recent controversy on the foundations of incomplete contract theory (Maskin and Tirole, 1999; Hart and Moore, 1999; Tirole, 1999), this survey aims at defining the very nature and origin of the contract incompleteness. Two main results are shown: (i) reasons usually advanced to explain...