List-Assisted Sampling

List-assisted sampling is a technique used in telephone surveys, which utilizes information from the Bell Core Research (BCR) telephone frame and directory listings to produce a simple random sample. This is accomplished by stratifying the BCR telephone frame into two strata. The high-density stratum consists of 100-banks that contain at least one listed number, and the low-density stratum consists of hundreds of banks without a listed number. The proportion of the sample drawn from each stratum depends on the requirements of the study. This technique started to be widely used by telephone survey researchers in the early 1990s because it increased the efficiency of traditional random-digit dialing (RDD) methods, in particular, the Mitofsky-Waksberg method. List-assisted sampling helps to provide a solid foundation, as well as ...