I'm thrilled that Xan Porter is back among the active ranks of search industry bloggers. We've really missed her. She's on a bit of an SEO-related kick, too, which is terrific. The latest posts include:

A Method of Removing Spam from the Index

(Researchers who presented a paper at the www2006 conference) state that: "...a new industry specialized in creating spam information has emerged, called Search Engine Optimization". SEO is hardly a new industry, and is well aware of the penalisations of spam creation, although there are still some spammers in the community...

...They look for noisy links by analysing the relationships between sites instead of pages...The research goes on in the area of spam removal and of rank cleansing for search engines. It is hard to improve precision and recall algorithmically, but it can be improved by dealing with index sanitisation. These methods are useful and are obviously successful to some extent, but it seems unnecessary to portray the SEO industry in a bad light in these modern times.

Thanks for the vote of confidence, Xan. It is no fun to think that the academics of the world consider our entire industry "spam," when 80% of my job or more is actually focused on helping businesses make their sites indexable and/or helping them build great content that's going to attract links - both of which are more in the search engines' interests than against them.

The Impact of SEO on Online Advertising Market

This paper written by BO Xing and Zhangxi Lin from the Texas Tech University discusses the impact of SEO online. The study is conducted in an analytical way, using a number of good resources but has at times a simplistic view of the SEO effort. SEO's are considered to be of "parasitic nature", hindering the good functioning of search engines and cheating the user...

..."No SEO firm knows the ranking algorithm of the search engine, and therefore, SEO practice only improves the chance of ranking improvement, rather than guarantees top ranking. Given an advertiser and advertising requirement, algorithm robustness denotes the effectiveness of SEO with the search engine"...

..."More importantly, a search engine is potentially subject to “freeriding” effect from SEO firms, because of the parasitic nature of these firms.... First, a search engine could optimize its pricing policies for higher-type advertisers to reap higher profit. Second, investment in algorithm robustness has the effect of protecting the investment in algorithm effectiveness. Third, the second market position endows the follower additional benefits due to low sustainability of SEO firms".

Clearly, there needs to be a greater recognition in the academic IR research industries that a difference exists between those who are conducting SE-friendly SEO and those who spam. It seems naive and impractical for researchers to ignore this distinction.