1. A method of generating shopper traffic data, comprising: determining a functional relationship between first in-person-based count data, first sensor-based count data, a product category corresponding to a first zone of a monitored establishment, and auditor-based count data corresponding to the first zone of the monitored establishment, the first in-person-based count data indicative of a first quantity of shoppers within the first zone of the monitored establishment, the first sensor-based count data indicative of a second quantity of shoppers within the first zone of the monitored establishment, the first in-person-based count data and the first sensor-based count data generated concurrently during a first time, and the auditor-based count data generated by an auditor instructed to move through the monitored establishment while counting shoppers in a plurality of zones of the monitored establishment; estimating second in-person-based count data based on the functional relationship and second sensor-based count data, the second in-person-based count data and the second sensor-based count data corresponding to one of: (a) the first zone of the monitored establishment during a second time different from the first time, or (b) a second zone of the monitored establishment during the first time; determining, via a processor, a coefficient set indicative of a relationship between the estimated second in-person-based count data and first sales data associated with the monitored establishment; and forecasting shopper traffic in a second establishment based on the coefficient set and second sales data associated with the second establishment without collecting shopper count data in the second establishment.