In this work the authors propose a novel Selectivity-Based Keyword Extraction (SBKE) method, which extracts keywords from the source text represented as a network. The node selectivity value is calculated from a weighted network as the average weight distributed on the links of a single node and...

The phenomenon of sponsored search advertising – where advertiserspay a fee to Internet search engines to be displayed alongside organic(non-sponsored) web search results – is gaining ground as thelargest source of revenues for search engines. Using a unique paneldataset of several hundred...

The phenomenon of sponsored search advertising where advertisers pay a fee to Internet search engines to be displayed alongside organic (non-sponsored) web search results is gaining ground as the largest source of revenues for search engines. Using a unique panel dataset of several hundred...

The phenomenon of sponsored search advertising--where advertisers pay a fee to Internet search engines to be displayed alongside organic (nonsponsored) Web search results--is gaining ground as the largest source of revenues for search engines. Using a unique six-month panel data set of several...