@ARTICLE{10.21494/ISTE.OP.2020.0561, TITLE={Strategic interactions between firms as evidenced by patent oppositions: the case of the European wind power industry}, AUTHOR={Valentin Lignau, }, JOURNAL={Technology and Innovation}, VOLUME={5}, NUMBER={Issue 4}, YEAR={2020}, URL={http://www.openscience.fr/Strategic-interactions-between-firms-as-evidenced-by-patent-oppositions-the}, DOI={10.21494/ISTE.OP.2020.0561}, ISSN={2399-8571}, ABSTRACT={This paper aims at analysing the uses of patent opposition proceedings on the European wind turbine market. Whereas the latter has experienced a massive development in recent decades, it is still quite concentrated, which makes it an ideal case for study. After conducting a descriptive analysis, we observe a rather “healthy” oligopolistic competition. Most of recorded oppositions involve two of the six top wind turbine manufacturers, which allows us to exclude the use of oppositions for predatory purpose. The analysis of the oppositions’ outcome also provides useful insights. Most oppositions seem to be justified as they have led to the revocation or the amendment of the underlying patent. However, we observe some heterogeneity between wind turbine manufacturers, with more or less offensive opposition behaviors that might be driven by market considerations.}}