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The Politz-Simmons Estimator is a method developed by statisticians Alfred Politz and Willard Simmons in 1949 for dealing with bias due to “not at home” entries in survey sampling. Dr. H. O. Hartley is one of the contributing statisticians to this methodology.

Before this, a common method for dealing with "not at homes" was to calling the individual back or revisiting them until they are home, but this becomes economically expensive as number of callbacks increases. Politz and Simmons' goal was to eliminate the need for callbacks.

The Politz-Simmons methodology aims to eliminate bias by dividing the population based on the percentage of time they are home, then weighting the data accordingly. The groups are calculated by the percentage of calls they pick up in a given time frame.