Abstract: Example methods, apparatus, systems and articles of manufacture to determine synthetic total audience ratings are disclosed. Disclosed example apparatus are to access census data including census viewing statements associated with media content presented by census devices, access panel data including panelist viewing statements associated with media content presented by panel devices, the panel data including weights to represent numbers of individuals to be represented by corresponding panelists, assign the census devices to the panel devices based on the weights, divide the weights for respective ones of the panelists into respective sets of split weights, and assign the census viewing statements to at least subsets of the sets of split weights to determine audience ratings for a population, the assignment of the census viewing statements to the at least subsets of the sets of split weights based on the assignment of the census devices to the panel devices.

Abstract: Example methods, apparatus, systems and articles of manufacture to determine synthetic total audience ratings are disclosed. Disclosed example apparatus are to access census data including census viewing statements associated with media content presented by census devices, access panel data including panelist viewing statements associated with media content presented by panel devices, the panel data including weights to represent numbers of individuals to be represented by corresponding panelists, determine scores representing similarities between ones of a first group of census devices determined to having matching panel devices in the panel data and ones of a second group of census devices determined to be unmatched in the panel data, and assign the census devices to the panel devices based on the scores and the weights.

Abstract: A method for managing virtual objects (O) corresponding to real objects (R), said virtual objects (O) comprising a set (OP) of information or data representing said real object (R), said virtual objects (0) residing in a management system (20), which comprises a computer system (21) accessible by user terminals (13) through a telecommunication network to enable operations to be carried out on said virtual objects (O) in a database (22a) in said computer system (21), said method comprising the operations of: generating (100), in response to a request of a requesting subject (C) to create one or more virtual objects (O) that represent respective real objects (R), corresponding unique identifier codes (Z, zx, c, i) that enable a user terminal (13) to carry out operations on the respective virtual object (O).