Database Overlap Jan. 5, 1999
by Greg R. Notess
Data from search engine analysis run on Jan. 5, 1999
Still remarkably little overlap!
This chart compares the results from four small, precise searches run on the largest ten search engines, including four that are based upon the Inktomi database. From a total of 176 pages found, 83 of the hits represent unique Web pages. Of those 83 unique Web pages, the largest group contained unique Web pages found by only one of the search engines.
Even with four Inktomi-based databases, there was a low degree of overlap even among those four. Three of them included unique hits not found by any of the other nine search engines.
See my analysis of unique hits to gain a sense of how the 34 unique pages were divided among the search engines. See below for older analysis of duplcation and overlap among the major search engines.
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