1. available at www.nber.org/papers/w9431. Also see W Cohen et al, 'R&D Spillovers, Patents and the Incentives to Innovate in Japan and the United States;A Arora;Research Policy, 1349-67 and M Hall et al, 'Barriers to the Use of Patent Information in UK Small and Medium-Sized Enterprises: Part,2000
2. University of Chicago Law Review 625-679. Also see L Oppenheim, 'How SMEs Use the Patent Literature' Summary Report for the UK Economic and Social Research Council;C Long;Patent Signals,1998
3. The study also considers other parameters of size with respect to other recent surveys. E Archontopoulous et al, 'When Small is Beautiful: Measuring the Evolution and Consequences of the Voluminosity of Patent Applications at the EPO;CEB Working