Actually I think that you need to specify, what kind of information growth you are interested in. Information as digital data, as www content, amount of literature, mass media or scientific publications? If you are interested in scientific aspect of information, perhaps the following article will be useful for you. It explains the principle at work in ISI Web of Knowledge. There you can find some statistics of journal articles and perhaps it's references may help you somehow. Testa, J., The Thomson Scientific Journal Selection Process [Retreived 1 January 2007] Available at http://scientific.thomson.com/free/essays/selectionofmaterial/journalselecti on Best wishes, Alexander Semenov. P.S. I wonder - when did the notion of "information" separated from notion of "knowledge" in philosophical sense? Isn't it connected with emergence of computers, Internet, etc.? Does anybody have any ideas about it?