Abstract: A system draws an inference about the audience being targeted by the buyer of an advertisement placement opportunity by correlating the order for the advertisement placement opportunity with characteristics of the audience associated with the television program in which the advertisement placement opportunity is embedded. Sellers of advertisement placement opportunities may use the inferred target audience information to appropriately price their advertising inventories and to fulfill orders more effectively.

Abstract: A system draws an inference about the audience being targeted by the buyer of an advertisement placement opportunity by correlating the order for the advertisement placement opportunity with characteristics of the audience associated with the television program in which the advertisement placement opportunity is embedded. Sellers of advertisement placement opportunities may use the inferred target audience information to appropriately price their advertising inventories and to fulfill orders more effectively.

Abstract: A computer system provides a virtual marketplace in which an advertising opportunity (such as a television advertising opportunity) is expressed in terms of an audience model representing an audience associated with the advertising opportunity. The computer system provides potential buyers of a particular advertising opportunity with information about the audience model associated with that advertising opportunity. The computer system sells advertising opportunities to buyers using any of a variety of transaction semantics. A buyer who purchases a particular advertising opportunity purchases the opportunity to present an advertisement to an audience represented by the audience model associated with the purchased advertising opportunity.