First, we have to establish what “innovation” means. This word can have various meanings. If we talk about innovation in terms of economic performance, we can say that economic performance went up until the mid-1990s. But if we talk about therapeutic innovation in the pharmaceutical sector, meaning results in terms of health, the answer is no.
Patent policies do not necessarily improve therapeutic innovation. They may increase research and development funding, but, if the primary purpose of the funding is to have access to research that has already been done and that is protected by a patent, that does not contribute to increasing therapeutic innovation.