Similar Search Results

Bargaining failure and freedom to operate : re-evaluating the effect of patents on cumulative innovation

Gaessler, Fabian; Harhoff, Dietmar; Sorg, Stefan - 2019

We investigate the causal effect of patent rights on cumulative innovation, using large-scale data that approximate the … patent universe in its technological and economic variety. We introduce a novel instrumental variable for patent invalidation … that exploits personnel scarcity in post-grant opposition at the European Patent Office. We find that patent invalidation …

Persistent link: https://www.econbiz.de/10012139072

Patents, freedom to operate, and follow-on innovation : evidence from post-grant opposition

Gäßler, Fabian; Harhoff, Dietmar; Sorg, Stefan; … - 2024

We study the blocking effect of patents on follow-on innovation by others. We posit that follow-on innovation requires …. Where licensing fails, follow-on innovation is blocked unless firms gain FTO through patent invalidation. Using large …-scale data from post-grant oppositions at the European Patent Office, we find that patent invalidation increases follow …

Persistent link: https://www.econbiz.de/10014503038

Filling the gap : the consequences of collaborator loss in corporate R&D

Poege, Felix; Gäßler, Fabian; Hoisl, Karin; Harhoff, … - 2022

We examine how collaborator loss affects knowledge workers in corporate R&D. We argue that such a loss affects the remaining collaborators not only by reducing their team-specific capital (as argued in the prior literature) but also by increasing their bargaining power over the employer, who is...

Persistent link: https://www.econbiz.de/10014458846

R&D incentives and spillovers in a two-industry model

Harhoff, Dietmar - 1991

This paper develops a two-industry model of R&D. A monopolist supplier sells an intermediate good to an oligopolistic buyer industry where firms compete in quantity and quality-enhancing R&D. The supplier can contribute to downstream product improvements by creating spillover knowledge which...

Persistent link: https://www.econbiz.de/10011619933

What are the channels for technology sourcing? : panel data evidence from German companies

Harhoff, Dietmar; Müller, Elisabeth; Van Reenen, John - 2013

Persistent link: https://www.econbiz.de/10009745140

Citation frequency and the value of patented innovation

Harhoff, Dietmar; Narin, Francis; Scherer, Frederic M.; … - 1997

which German patent renewal fees were paid to full-term expiration in 1995. A search of subsequent U.S. and German patents … yielded a count of citations to those patents. Patents renewed to full term were significantly more valuable than patents … allowed to expire before their full term. The higher an invention's economic value estimate was, the more the relevant patent …

Persistent link: https://www.econbiz.de/10011417779

Exploring the tail of patented invention value distributions

Harhoff, Dietmar; Scherer, Frederic M.; Vopel, Katrin - 1997

Patent renewal studies reveal a highly rightward-skewed distribution of patent values. Our approach elicits valuations … approximating those of the patented invention. This paper focuses on the full-term patents of the application year 1977 held by West …

Persistent link: https://www.econbiz.de/10011417839

Exploring the tail of patented invention value distributions

Harhoff, Dietmar - 1997

We explore the tail of patented invention value distributions by using value estimates obtained directly from patent … holders. The paper focuses on those full-term German patents of the application year 1977 which were held by West German and U ….S. residents. The most valuable patents in our data account for a large fraction of the cumulative value over all observations …

Persistent link: https://www.econbiz.de/10013428141

Citation frequency and the value of patented innovation

Harhoff, Dietmar (contributor) - 1997

Persistent link: https://www.econbiz.de/10013428229

Are there financing constraints for R&D and investment in German manufacturing firms?

Harhoff, Dietmar - 1996

Using a newly constructed panel dataset of German enterprises, I estimate R&D and capital investment equations for the time period from 1990 to 1994. Simple accelerator specifications indicate considerable sensitivity of R&D and investment to cash flow for relatively small firms. Much of this...

Persistent link: https://www.econbiz.de/10011621855