Does anyone out there know what recent studies predict for the lifetime of digitally archived and preserved documents? For example, there is a long and mostly pretty successful tradition of preserving journal articles as paper in bound volumes, and experiment shows that this approach is usually good for hundreds of years. It *seems* obvious to me that the physical resilience of paper is outweighed by the ability to make infinite perfect copies of digital documents, but obviously we haven't had hundreds of years of experience in which empirically test that idea. Are there any published studies that predict and compare the long-term preservation ability and cost efficiency of physical and digital archives? I would like to either back up or refute my intuition! Thanks, -- Mike.