technological trajectories', Research Policy, 11(3), 147-62. -- Drucker, P. (1985), Innovation and Entrepreneurship: Practice and …-29. -- Elfring, T. and W. Hulsink (2003), 'Networks in entrepreneurship: The case of high-technology firms', Small Business Economics …-52. -- Short, J.C., D.J., Ketchen, Jr., C.L. Shook and R.D. Ireland (2010), 'The concept of "opportunity" in entrepreneurship …