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Christian Helmers

University of California System

33H指数
227论文数
4.0K被引数
收录论文 7
发表时间
The Choice between Formal and Informal Intellectual Property: A Review
err2014-06-01
err268
errOAAI
errHall, Bronwyn; Helmers, Christian; Rogers, Mark; Sena, Vania
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DO SPILLOVERS MATTER WHEN ESTIMATING PRIVATE RETURNS TO R&D?
err2013-05-01
err167
PREAI
errEberhardt, Markus; Helmers, Christian; Strauss, Hubert
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