Predicting Site Quality

A non-transitory storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:

• obtaining baseline site quality scores for a plurality of previously-scored sites;
• generating a phrase model for a plurality of sites including the plurality of previously-scored sites, wherein the phrase model defines a mapping from phrase-specific relative frequency measures to phrase-specific baseline site quality scores;
• for a new site, the new site not being one of the plurality of previously-scored sites, obtaining a relative frequency measure for each of a plurality of phrases in the new site;
• determining an aggregate site quality score for the new site from the phrase model using the relative frequency measures of the plurality of phrases in the new site;
• and
• determining a predicted site quality score for the new site from the aggregate site quality score.

A system comprising:

• one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising:
• obtaining baseline site quality scores for a plurality of previously-scored sites;
• generating a phrase model for a plurality of sites including the plurality of previously-scored sites, wherein the phrase model defines a mapping from phrase-specific relative frequency measures to phrase-specific baseline site quality scores;
• for a new site, the new site not being one of the plurality of previously-scored sites, obtaining a relative frequency measure for each of a plurality of phrases in the new site;
• determining an aggregate site quality score for the new site from the phrase model using the relative frequency measures of the plurality of phrases in the new site;
• and
• determining a predicted site quality score for the new site from the aggregate site quality score.