If you want to improve you market and search for information how to messure your page rank here i found this article If you are serious about improving your Web site relevance on Google (and as a consequence on several other major search engines) you should understand quite well what Pagerank is and how it works. Pagerank is a an algorithm that Google utilizes to rank its search results in presence of multiple resources matching a certain query. In very simple words Pagerank evaluates and ranks Web sites according to a computed value determined by the number of other sites linking to them. The way the Pagerank value is computed makes Pagerank somewhat immune to artificial linking efforts. In order to provide the greatest understanding and to allow an exhaustive mini-guide to Pagerank understanding I have researched and listed here below the most interesting and valuable resource on this topic that are available online. Including the original Stanford paper from which the whole thing started. 1) The original PageRank paper by Googles founders Sergey Brin and Lawrence Page: The Anatomy of a Large-Scale Hypertextual Web Search Engine http://www-db.stanford.edu/~backrub/ google.html 2) What can you do with a Web in your Pocket by Sergey Brin, Rajeev Motwani, Larry Page und Terry Winograd Web Archive 3) The PageRank Citation Ranking: Bringing Order to the Web by Lawrence Page, Sergey Brin, Rajeev Motwani und Terry Winograd http://dbpubs.stanford.edu:8090/pub/ showDoc.Fulltext?lang=en&doc= 1999-66&format=pdf&compression= 4) Efficient Crawling Through URL Ordering by Junghoo Cho, Hector Garcia-Molina and Lawrence Page http://dbpubs.stanford.edu:8090/pub/ showDoc.Fulltext?lang=en&doc= 1998-51&format=pdf&compression= 5) Attack Resistant Trust Metrics Draft of PhD thesis in compact formatting by Raph Levien http://www.levien.com/thesis/compact.pdf 6) United States Patent 6,285,999: Method for node ranking in a linked database http://164.195.100.11/netacgi/ nph-Parser?Sect1=PTO1&Sect2= HITOFF&d=PALL&p=1&u=/netahtml/ srchnum.htm&r=1&f=G&l=50&s1 =6,285,999.WKU.&OS=PN/ 6,285,999&RS=PN/6,285,999 7) Google PageRank web site http://pr.efactory.de/ This Web site is devoted exclusively to Google Pagerank. Its sections are devoted to: Pagerank algorithm, Implementation, Inbound and Outbound Links, Number of Pages, Yahoo bonus, Additional Factors and more. It provides also a valuable guide on how to compute your Pagerank without using the Google toolbar. http://pr.efactory.de/ e-pagerank-implementation.shtml 
Pagerank explained correctly and with examples http://www.iprcom.com/papers/pagerank/