1. Markets for Technology
2. Brennan, M. F., Pray, C. E. and Courtmanche, A. Impact of industry concentration on innovation in the US plant biotech industry. In. Transitions in agbiotech: Economics of strategy and policy: Proceedings of NE-165 conference. Edited by: Lesser, W. pp.153–74. Washington, DC http://ageconsearch.umn.edu/handle/26008(accessed November 3, 2010)