1. Economic Welfare and the Allocation of Resources for Invention;Arrow,1962
2. Hide/Trade/Reveal Behavior related to Manufacturing Process Know-How;Drane,1985
3. The Character of Research and Development in a Competitive Economy;Hitch,1958
4. An Analysis of Cooperative Research and Development;Katz;Rand Journal of Economics,1986
5. The Production and Use of Knowledge in the United States;Machlup,1962