The Patent Wars

NPR recently quoted an entrepreneur who said that almost 30 percent of patents awarded in the US are on things that have already been invented!

http://www.npr.org/blogs/money/2011/07/26/138576167/when-patents-attack

Two sided markets and network externalities

Does this paper explain why Google is not such a great search engine anymore?

http://idei.fr/doc/wp/2007/twoside_platform.pdf