Do we need a price index for industrial R&D?

This publication has 4 references indexed in Scilit:

• U.S. agricultural research deflators: 1890–1985
  Research Policy, 1989
• Price Indexes for R and D Inputs, 1969–1983
  Management Science, 1987
• R&D price indexes and real R&D expenditures in the United States
  Research Policy, 1983
• Issues in Assessing the Contribution of Research and Development to Productivity Growth
  The Bell Journal of Economics, 1979