Technological Opportunity and Spillovers of R & D: Evidence from Firms’ Patents, Profits, and Market Value[J] . Adam B. Jaffe.The American Economic Review . 1986 (5)
Technological Opportunity and Spillovers of R & D: Evidence from Firms’ Patents, Profits, and Market Value[J] . Adam B. Jaffe.The American Economic Review . 1986 (5)