We investigate whether patents that are jointly held by legally independent companies help sustain product …-market collusion. We use a simple model of repeated interactions to show that joint patents can serve collusive purposes. Our model … generates two testable predictions: when joint patents are held for collusive purposes, a) there is a positive relationship …

, and measuring the number of patents by itself does not provide an indication of their relative importance and impact …

explained by quality and relevance issues. Although the number of patents has been soaring, few are genuine inventions …. Relatively low utilisation rates of patents point to a low degree of relevance. This paper uses a representative survey of … ownership. It also overviews government subsidies across firms. Transport equipment makers hold most patents per firm, followed …

patents. Those jointly filed by industry and research institutions grew even faster. However, research institutions’ share in … patent applications remains low and their ratio of patents granted to applications is below that of industry. An econometric …

returns by technology and cumulative patent value. While the returns earned by most patents dissipate rapidly, high valued … patents tend to receive significant returns through the latter part of the patent term. These high valued patents which … selectively renew the subset of high valued patents. …