1. A server comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: receiving a request over a network for an occupancy estimate for a building; accessing first values of first explanatory variables associated with a location of the building, wherein the first explanatory variables are predictive of first reported occupancy estimates of a first occupancy estimating source; evaluating a first occupancy model according to the first values to generate a first occupancy estimate for the building; evaluating a second occupancy model according to the first values to generate a second occupancy estimate for the building; accessing second values of second explanatory variables associated with the location of the building, wherein the second explanatory variables are predictive of second reported occupancy estimates of a second occupancy estimating source; evaluating a third occupancy model according to the second values to generate a third occupancy estimate for the building; evaluating a fourth occupancy model according to the second values to generate a fourth occupancy estimate for the building; statistically combining the first occupancy estimate, the second occupancy estimate, the third occupancy estimate, and the fourth occupancy estimate to generate a mixed occupancy estimate; and reporting the mixed occupancy estimate of the network.