Author:
Trajtenberg Manuel,Shalem Roy
Reference47 articles.
1. Dummy variables which indicate which of the six main technological categories the main USPTO patent class of the current patent corresponds to. The six categories are respectively Computers & Communications;Cat2 Cat1;Drugs & Medical, Electrical & Electronics, Chemical, Mechanical and Others
2. Patents granted at the European Patent Office by 2009 & ICT-related patents granted at the European Patent Office by 2009 & Biotechnology patents granted at the European Patent Office by 2009 & Nanotechnology patents granted at the European Patent Office
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