benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …, particularly among large firms and firms that are caught up directly in patent thickets. These findings indicate that post … either patent thickets or highly dispersed patent ownership. …

We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of … patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological … years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist …

We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of … patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological … years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist …

We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of … patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological … years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist …

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent … citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the … by patent thickets. …

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent … citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the … by patent thickets. …

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent … citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the … by patent thickets. …