References
- Banerjee, P.M., & Cole, B. M. (2010). Breadth-of-impact frontier: How firm-level decisions and selection environment dynamics generate boundary-spanning inventions. Technovation, 30(7), 411–419.
- Banks, M.G. (2006). An extension of the Hirsch index: Indexing scientific topics and compounds. Scientometrics, 69(1), 161–168.
- Bornehag, C.G., Sundell, J., Weschler, C.J., Sigsgaard, T., Lundgren, B., Hasselgren, M., & Hägerhed-Engman, L. (2004). The association between asthma and allergic symptoms in children and phthalates in house dust: A nested case-control study. Environmental Health Perspectives, 112(14), 1393–1397.
- Bouyssou, D., & Marchant, T. (2011). Ranking scientists and departments in a consistent manner. Journal of the American Society for Information Science and Technology, 62(9), 1761–1769.
- Braun, T., Glänzel, W., & Schubert, A. (2005). A Hirsch-type index for journals. The Scientist, 19(22), 8.
- Breschi, S., Lissoni, F., & Malerba, F. (2003). Knowledge-relatedness in firm technological diversification. Research Policy, 32(1), 69–87.
- Chen, J.H., Jang, S.L., & Wen, S.H. (2010). Measuring technological diversification: Identifying the effects of patent scale and patent scope. Scientometrics, 84(1), 265–275.
- Chen, Y.S., Shih, C.Y., & Chang, C.H. (2013). Patents and market value in the U.S. pharmaceutical industry: new evidence from threshold regression. Scientometrics, 97(2), 161–176.
- Chiu, Y.C., Lai, H.C., Liaw, Y.C., & Lee, T.Y. (2010). Technological scope: Diversified or specialized. Scientometrics, 82(1), 37–58.
- Denicolò, V. (1996). Patent races and optimal patent breadth and length. Journal of Industrial Economics, 44(3), 249–265.
- Gilbert, R., & Shapiro, C. (1990). Optimal patent length and breadth. RAND Journal of Economics, 21(1), 106–112.
- Goldstein, L., & Zhang, H.M. (2009). Efficiency of the maximum partial likelihood estimator for nested case control sampling. Bernoulli, 15(2), 569–597.
- Grönqvist, C. (2009). The private value of patents by patent characteristics: Evidence from Finland. Journal of Technology Transfer, 34(2), 159–168.
- Guan, J.C., & Gao, X. (2009). Exploring the h-index at patent level. Journal of the American Society for Information Science and Technology, 60(1), 35–40.
- Hagedoorn, J., & Cloodt, M. (2003). Measuring innovative performance: Is there an advantage in using multiple indicators? Research Policy, 32(8), 1365–1379.
- Hirsch, J.E. (2005). An index to quantify an individual’s scientific research output. Proceedings of the National Academy Sciences of the United States of America, 102(46), 16569–16572.
- Hu, X.J., & Rousseau, R. (2015). A simple approach to describe a company’s innovative activities and their technological breadth. Scientometrics, 102(1), 1401–1411.
- Hu, X.J., Rousseau, R., & Chen, J. (2012). A new approach for measuring the value of patents based on structural indicators for ego patent citation networks. Journal of the American Society for Information Science and Technology, 63(9), 1834–1842.
- ISTIS: Institute of Scientific & Technical Information of Shanghai (2003). Feature analysis on global pharmaceutical industry 2002–2003, small change in the periodic R&D. Retrieved on August 20, 2012, from http://www.istis.sh.cn/list/list.aspx?id=3958 (in Chinese).
- Kanniainen, V., & Stenbacka, R. (2000). Endogenous imitation and implications for technology policy. Journal of Institutional and Theoretical Economics, 156(2), 360–381.
- Klemperer, P. (1990). How broad should the scope of patent protection be? RAND Journal of Economics, 21(1), 113–130.
- Lee, Y.G. (2009). What affects a patent’s value? An analysis of variables that affect technological, direct economic, and indirect economic value: An exploratory conceptual approach. Scientometrics, 79(3), 627–637.
- Lerner, J. (1994). The importance of patent scope: an empirical analysis. RAND Journal of Economics, 25(2), 319–333.
- Leydesdorff, L. (2015). Can technology life-cycles be indicated by diversity in patent classifications? The crucial role of variety. Scientometrics, 105(3), 1441–1451.
- Liu, Y.X., & Rousseau, R. (2009). Properties of Hirsch-type indices: The case of library classification categories. Scientometrics, 79(2), 235–248.
- Lodh, S., & Battaggion, M.R. (2014). Technological breadth and depth of knowledge in innovation: The role of mergers and acquisitions in biotech. Industrial and Corporate Change, 24(2), 383–415.
- McMillan, G.S., & Thomas, P. (2005). Financial success in biotechnology: Company age versus company science. Technovation, 25(5), 463–468.
- Merges, R.P., & Nelson, R.R. (1990). On the complex economics of patent scope. Columbia Law Review, 90(4), 839–916.
- Miller, D.J. (2006). Technological diversity, related diversification, and firm performance. Strategic Management Journal, 27(7), 601–619.
- O’Donoghue, T., Scotchmer, S., & Thisse, J.F. (1998). Patent breadth, patent life, and the pace of technological progress. Journal of Economics & Management Strategy, 7(1), 1–32.
- Olivo, C., Lebedeva, I., Chu, C.Y., Lin, C.Y., & Wu, S.Y. (2011). A patent analysis on advanced biohydrogen technology development and commercialisation: Scope and competitiveness. International Journal of Hydrogen Energy, 36(21), 14103–14110.
- Ozman, M. (2007). Breadth and depth of main technology fields: An empirical investigation using patent data. Middle East Technical University Working Paper, 2007.
- Palokangas, T. (2011). Optimal patent length and breadth in an economy with creative destruction and non-diversifiable risk. Journal of Economics, 102(1), 1–27.
- Prencipe, A. (2000). Breadth and depth of technological capabilities in CoPS: The case of the aircraft engine control system. Research Policy, 29(7–8), 895–911.
- Reitzig, M. (2003). What determines patent value? Insights from the semiconductor industry. Research Policy, 32(1), 13–16.
- Rousseau, R. (2016). Citation data as a proxy for quality or scientific influence are at best PAC (Probably Approximately Correct). Journal of the Association for Information Science and Technology (to appear); DOI: 10.1002/asi.23525.
- Sapsalis, E, van Pottelsberghe de la Potterie, B., & Navon, R. (2006). Academic versus industry patenting: An in-depth analysis of what determines patent value. Research Policy, 35(10), 1631–1645.
- Trajtenberg, M. (1990). A penny for your quotes: Patent citations and the value of inventions. Rand Journal of Economics, 21(1), 172–187.
- Valiant, L. (2013). Probably Approximately Correct. New York: Basic Books.
- Waltman, L., & van Eck, N.J. (2012). The inconsistency of the h-index. Journal of the American Society for Information Science and Technology, 63(2), 406–415.
- Wang, Q., & von Tunzelmann, N. (2000). Complexity and the functions of the firm: Breadth and depth. Research Policy, 29(7–8), 805–818.
- WIPO (2000). Patent law treaty, available at http://www.wipo.int/treaties/en/ip/plt/ (last visited on 2016, February 20).
- Zhang, G.P., Chen, X.D., & Niu, X. (2012). The technology complexity based on patent width and depth (in Chinese). Science Research Management, 33(3), 113–135.