> The peer review process might be more expensive/intensive than PageRank for all I know, so perhaps journal publishers are doing much more work than search eng

> The peer review process might be more expensive/intensive than PageRank for all I know, so perhaps journal publishers are doing much more work than search engines. The peer review process is labor intensive, but to add insult to injury, publishers aren't the ones doing it and they don't pay reviewers. It's all done for free by researchers. At best publishers add some proof reading services, but in many cases not even that.