1. Alchian A, Demsetz H (1972) Production, information costs, and economic organization. Am Econ Rev 62(5):777–795
2. Allen RC (1983) Collective invention. J Econ Behav Organ 1:1–10
3. Antonelli C (2007) Technological knowledge as an essential facility. J Evol Econ 17(4):451–471
4. Arrow K (1962) Economic Welfare and the allocation of resources for invention, in NBER the rate and direction of inventive activity: economic and social factors, 609–626. Reprinted in Lamberton DM (ed.) (1971) The economics of information and knowledge, Harmondsworth: Penguin, 141–159
5. Baldwin C, von Hippel E (2010) Modelling a paradigm shift: from producer innovation to user and open collaborative innovation, SSRN Working Paper available at http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1502864