23. A computer-implemented method for evaluating the supply of electronic content on an electronic network, the method comprising: receiving search results history for a plurality of queries by users for at least one keyword; determining, with at least one processor at least one of the following: a search results variability of the search results history for the plurality of queries for the at least one at least one keyword, wherein determining the search results variability includes calculating a number of unique results contained in the search results history for the plurality of queries for the at least one keyword; a click results variability for queries for the at least one keyword, wherein determining the click results variability includes calculating a number of times each unique result contained in the search results history was clicked on; and an abandonment rate for the plurality of queries for the at least one keyword, wherein determining the abandonment rate includes calculating a number of times the users abandoned queries by not clicking on any result in the search results history for the plurality of queries for the at least one keyword; determining, with at least one processor, a supply value indicative of a supply of electronic content on the electronic network relating to the at least one keyword, based on the at least one of the search results variability, the click results variability, or the abandonment rate; and making an additional supply of electronic content relating to the at least one keyword available on the electronic network, based on the determined supply value.
23. A computer-implemented method for evaluating the supply of electronic content on an electronic network, the method comprising: receiving search results history for a plurality of queries by users for at least one keyword; determining, with at least one processor at least one of the following: a search results variability of the search results history for the plurality of queries for the at least one at least one keyword, wherein determining the search results variability includes calculating a number of unique results contained in the search results history for the plurality of queries for the at least one keyword; a click results variability for queries for the at least one keyword, wherein determining the click results variability includes calculating a number of times each unique result contained in the search results history was clicked on; and an abandonment rate for the plurality of queries for the at least one keyword, wherein determining the abandonment rate includes calculating a number of times the users abandoned queries by not clicking on any result in the search results history for the plurality of queries for the at least one keyword; determining, with at least one processor, a supply value indicative of a supply of electronic content on the electronic network relating to the at least one keyword, based on the at least one of the search results variability, the click results variability, or the abandonment rate; and making an additional supply of electronic content relating to the at least one keyword available on the electronic network, based on the determined supply value. 25. The method of claim 23 , wherein the at least one keyword includes a group of related keywords.