I'm having trouble finding the source (I suspect a brief in Eldred v. Ashcroft), but I recall reading that over 90% of books are out of print within 3 years of

I'm having trouble finding the source (I suspect a brief in Eldred v. Ashcroft), but I recall reading that over 90% of books are out of print within 3 years of their initial publication. I've also seen claims that it's typical for heavily marketed movies and video games to make roughly half of their total revenue in the first week of release, though I'm not sure where to find the actual numbers for that, and it probably doesn't account for re-releases (DVD, "HD remaster", etc.). edit: Based on skimming some numbers at vgchartz.com, it looks like the basic shape of the claim for heavily marketed video games is right, but the revenue half-life is more like three or four weeks.