In this paper we abandon the usual assumption that patents bring known benefits to the industry or that their benefits are known to all parties. When royalty payments are increasing in one's patent portfolio, private information about the quality of patents leads to a variety of distortions, in...

We provide an economic analysis of the static and dynamic effects of copyright levies on hardware. Contrary to copyright levies on supports such as tapes, CDs or DVDs, whose main use is to copy, levies on hardware do not modify the propensity of consumers to use 'illegal' content. They decrease...