I don't see any explanation here of why "copyright law may exacerbate risk"
The only thing I can think of is "moral rights", which I have heard exist in mainland Europe and are inalienable, i.e. non-transferable. That means that it can be, in effect, impossible for an author to sell his or her work in a definitive, irrevocable fashion: there's always the possibility that the author might come back later and object to the way the work is being used and the purchaser will be ordered by a court to stop distributing the work. Obviously that discourages purchasers, and although it's expressed as an additional "right", it is actually a restriction on authors as they are prevented from doing something that would be able to do in the UK or the USA.