1. Clint Cummins, Zvi Griliches, Bronwyn Hall and Adam Jaffe, Who Does R&D and Who Patents?;Bound,1984
2. Clustering Algorithms;Hartigan,1975
3. Quantifying the Effects of Technological Opportunity and Research Spillovers in Industrial Innovation;Jaffe,1985
4. Technological Opportunity and Spillovers of R&D: Evidence from Firms' Patents, Profits and Market Value;Jaffe;American Economic Review,1986
5. Demand and Supply Influences in R&D Intensity and Productivity Growth;Jaffe;Review of Economics and Statistics,1988