References
- Arora, A. and Gambardella, A. (1990) Complementarity and external linkages: the strategies of the large firms in biotechnology. Journal of Industrial Economics, 38, 362–79.
- Basant, R. and Fikkert, B. (1996) The effects of R&D, foreign technology purchase, domestic and international spillovers on productivity in Indian firms. Review of Economics and Statistics, 78, 187–99.
- Blonigen, B. and Taylor, C. (2000) R&D intensity and acquisitions in high-technology industries: evidence from the US electronic and electrical equipment industries. The Journal of Industrial Economics, 48, 47–70.
- Cassiman, B. and Veugelers, R. (2006) In search of complementarity in the innovation strategy: internal R&D and external knowledge acquisition. Management Science, 52, 68–82.
- Catozzella, A. and Vivarelli, M. (2007) The Catalysing Role of In-House R&D in Fostering the Complementarity of Innovative Inputs, IZA Discussion Paper 3126, IZA, Bonn.
- Cohen, W. M. and Levinthal, D. A. (1989) Innovation and learning: two faces of R&D. Economic Journal, 99, 569–96.
- Hagedoorn, J. and Wang, N. (2012) Is there complementarity or substitutability between internal and external R&D strategies?, Research Policy, 41, 1072–83.
- Kodde, D. A. and Palm, F. C. (1986) Wald criteria for jointly testing equality and inequality restrictions. Econometrica, 54, 1243–8.
- Lokshin, B., Carree, M. and Belderbos, R. (2004) Testing for Complementarity and Substitutability in Case of Multiple Practices, METEOR memorandum RM04002, University of Maastricht, Maastricht.
- Pisano, G. P. (1990) The R&D boundaries of the firm: an empirical analysis. Administrative Science Quarterly, 35, 153–76.
- Wolak, F. (1989) Testing inequality constraints in linear econometric models. Journal of Econometrics, 41, 205–35.
![Supercharge Your Next Research Paper: Research and write your next paper with Jenni AI.]({"type":"image" , "src" : "/sda/112440/MPU-Jenni-AI-ECONOMICS.png"})