URLs: Mean time of survival?

[Susan Gerhart]

On Mon, 28 Jul 1997 01:40:36 -0700, you wrote:

>Dear Web4Lib-ers,
>
>   in a paper I'm writing I'll have to add a line con-
>cerning the tendency of URLs to change and to become
>obsolete, ...
>   Does anyone know about any statistical information
>on the "mean time of survival" of URLs and electronic

One related measure is most collections of URLs (say, 1000-2000 URLs on a topic)
from search engines will be about 10-20% dead links,  indicating probably more
types than you've mentioned, e.g. job postings/resumes (seen in .net and .com),
newsletters (.org often).

********************************************
*  Research Outlet and Integration/ROI JV      
*  281-486-8480
*  slger at netropolis.net http://www.roir.com
*******************************************************