Abstract: In general, one aspect described can be embodied in a method for providing input to a document ranking process for ranking a plurality of documents, the document ranking process taking as input a quality of result statistic for a query and an individual document. The method can include, for a first document identified as a search result of a query, receiving information regarding an anchor contained within the first document, where the anchor provides a link to a second document; deriving a quality of result statistic for the second document from at least a portion of first data associated with the first document and the query, the first data being indicative of user behavior relative to the first document as a search result for the query; and providing the first quality of result statistic as input to the document ranking process for the second document and the query.