1. Economic Welfare and the Allocation of Resources for Invention;Arrow,1961
2. The Economic Implications of Learning by Doing;Arrow,1962
3. Optimal Timing of Innovations;Barzel;Review of Economics and Statistics,1968
4. Trade Policy and Economic Welfare;Corden,1974
5. Uncertainty, Industrial Structure and the Speed of R&D;Dasgupta;Bell Journal of Economics,1980