1. Abramowitz, M., & David, P. (1996). Technological change and the rise of intangible investments: The US economy’s growth-path in the 20th century, in employment and growth in the knowledge-based economy. Paris: OECD.
2. Aghion, P., & Howitt, P. (2007). Capital, innovation, and growth accounting. Oxford Review of Economic Policy, 23(1), 79–93.
3. Bernstein, J., & Nadiri, I. (1988). Interindustry spillovers, Rates of Return and Production in High-tech Industries. American Economic Review: Papers and Proceedings, 78, 429–434.
4. Bernstein, J., & Nadiri I. (1991). Product Demand, Cost of Production, Spillovers, and the Social Rate of Return to R&D. NBER working paper no. 3625, Cambridge, MA.
5. Brinkley, I. (2006). Defining the knowledge economy (pp. 5–6). London: The Work Foundation.