BaileyM. N., “Research and Development Costs and Returns: The U.S. Pharmaceutical Industry,”Journal of Political Economy, Vol. 80, No. 1, Jan./Feb. 1972, 70–85.
2.
BellF. W., ‘Technological Externalities and Common Property Resources: An Empirical Study of the U.S. Northern Lobster Fishery,”Journal of Political Economy, Vol. 80, Jan./Feb. 1972, 148–58.
3.
BohmP., External Economies in Production. Stockholm: Almqvist and Wiksell, Stockholm Economic Studies, 1970.
4.
ChipmanJ. S., “External Economies of Scale and Competitive Equilibrium,”Quarterly Journal of Economics, Vol. LXXXIV, Aug. 1970, 347–85.
5.
→ DrandakisC. M.PhelpsC. S., “A Model of Induced Invention, Growth and Distribution,”Economic Journal, Vol. 76, Dec. 1966, 823–39.
6.
→ GrilichesZ., “Hybrid Corn: An Exploration in the Economics of Technological Change,”Econometrica, Vol. 25, Oct. 1957, 501–22.
7.
→ GrilichesZ., “Research Costs and Social Returns: Hybrid Corn and Related Innovations,”Journal of Political Economy, Vol. 66, Oct. 1958, 419–31.
8.
GrilichesZ., “Research Expenditures, Education and the Aggregate Agricultural Production Function,”American Economic Review, Vol. LIV, Dec. 1964, 961–74.
9.
MargolisJ.GerittonH., Public Economics. New York: St. Martin, 1969.
10.
→ NelsonR., “The Simple Economics of Basic Scientific Research,”Journal of Political Economy, Vol. 67, June 1959, 297–306.
11.
NordhausW. D., Invention, Growth and Welfare: A Theoretical Treatment of Technological Change. Cambridge: MIT Press, 1969.