Abstract: Currency data regarding the monitored media network including a first viewership count indicating a first number of viewers viewing the monitored media network during a first series of time intervals and demographic information regarding the first number of viewers may be received. Set-top-box viewership data regarding the monitored media network may also be received from a set top box. The set-top-box viewership data may include a second viewership count indicating a second number of viewers viewing the monitored media network during a second series of time intervals. The first and second viewership counts may be transformed into first and second series of data, respectively. The first and second series of data may be compared to with one another determine factors and/or coefficients, which may be applied to the second viewership count to infer and/or forecast demographic information for the second viewership count. The method is generalized to unmonitored networks.