“…s (23.73) where C are the total costs, L is the number of persons employed, H are the hours per person, w is the hourly wage rate, K is the capital stock, c is the user cost of capital, k is the technical knowledge stock, b is the user cost of technical knowledge, Q is the potential industrial output, k is a constant, and C p is the rate of capital utilization. Thus, the optimum long-run demand function for technical knowledge is [Schott (1978) [Griliches (1986)] where R is the deflated gross investment in research.…”