" Or take the value of Wikipedia. The creation of this is more or less akin to installing a Bodleian library in every house in Britain. Does this massive new wealth register on GDP figures? Not a blip. Or the new availability of blogs and podcasts. Tremendous writers who, just a decade ago, would have been lecturing to half-empty theatres are now read by hundreds of thousands. Again, almost no money changes hands, so not a wiggle in the GDP figures. "

― Rory Sutherland , Rory Sutherland: The Wiki Man