 "Eric von Hippel, an economist at MIT..., studies the economics of distributed and open innovation. Professor von Hippel wanted to "walk the walk" and make his previously published book, ''Sources of Innovation'', freely available to the public online. So, he struck a deal with his publisher: If hard copy sales declined after he made his book freely available online, he would pay the publisher $0,000 as compensation for lost sales. If sales went up, the publisher would keep the profits and allow him to keep posting the free version. Happily, sales of printed copies went up, so he was able to keep the free version available online. Based on the success of this experiment, von Hippel was able to negotiate a non-exclusive license with his publisher for his next two books, ''Democratizing Innovation'' and ''Free Innovation''." + ** See 