1. A computer-implemented method, comprising: identifying a computer-implemented content object to serve as a contextual reference; accessing a first plurality of values, wherein each of the first plurality of values is based on an inference of a first user's interest level with respect to a topic, wherein each of the interest level inferences is derived from a plurality of behaviors; accessing a second plurality of values, wherein each of the second plurality of values is based on an inferred degree of relevance to a topic of one or more phrases that are contained in the content object; and generating a recommendation comprising one or more objects for delivery to the first user, wherein the recommendation is generated by a recommendation function executed on a processor-based device in accordance with the first plurality of values and the second plurality of values.