1. G�mmel and Braun (1997) for example use the terms 'vendors', 'firms' and 'brands' synonymic, suggesting a low importance of multi-brand firms in Germany. As far as available information allowed, multi-brand vendors in the USA and Australia were consolidated on the firm level. Producers in Australia of which only the year of a motorcycle registration is known were coded as being in existence in the year of registration. Resellers, however, buying complete motorcycles and just rebranding them -a procedure not uncommon in Australiawere dropped from the Australian dataset;Information in the publications used is mostly assembled around brands instead of firms. However, resulting data imperfections are believed to have little impact
2. Firm Entry and Exit in the Canadian Manufacturing Sector;J R Baldwin;Canadian Journal of Economics,1970
3. The Organizational Ecology of a Technological System;W P Barnett;Administrative Science Quarterly,1990
4. The Dynamics of Competitive Intensity;W P Barnett;Administrative Science Quarterly,1997
5. Do Larger Organizations Generate Stronger Competition?;W P Barnett;Organizational Evolution: New Directions,1990