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机译:坚固级别清洁或肮脏的创新估值更多吗?
London Sch Econ Grantham Res Inst Climate Change & Environm Sci Technol & Innovat Directorate OECD London England;
Univ Coll Dublin UCD Sch Business Dublin Ireland|Univ Coll Dublin Michael Smurfit Grad Business Sch Geary Inst Dublin Ireland;
Univ Coll Dublin UCD Sch Business Dublin Ireland;
Research and development; patents and citations; clean technology; dirty technology; market value;