Methods, computer program products and systems are described for obtaining at a first computer an online content item authored by an author for public online display. A credibility factor is determined for the author in association with the online content item. The credibility factor is based on information about the author to be true. In response to a query for online content, wherein the online content item is included in a set of search results, the ranking of the online content item in the set is determined in a second computer based at least in part on the credibility factor of the author. The first computer and the second computer can be the same or different computers.