2U.S.Department of Commerce,2004, " Pharmaceutical Price Controls in OECD Countries: Implications for the U.S.Consumers, Pricing, Research and Development, and Innovation ",International Trade Administration.
3Abbott, T.A., Vernon, J.,2005, " The Cost of US Pharmaceutical Price Reduction: A Financial Simulation Model of R&D " ,NBER Working Papers: 11114.
4Luc Anselin,2000, " Geographical SpiUovers .and University Research: A Spatical Econometric Perspective " . Growth and Change, Gatton of Business and Economics, University of Kentucky.
