We show how repeatedly awarded procurement contracts where unverifiable quality dimensions are relevant can be reinterpreted as relational contracts between a buyer and a contractor that is threatened by a potentially less efficient competitor. We compare two scenarios: 1) Under freedom of...

Public purchasing authorities are in a leading position for the introduction, promotion and development of green procurement. Indeed, the public sector can influence green procurement both by designing suitable policies and by driving 'green' markets through the significant share of public...