Centre Sampling for Estimating Elusive Population Size
نویسندگان
چکیده
The estimation of the size of an elusive population is a problem frequently addressed in many fields of applications. In the paper a sampling strategy for the estimation of the size, named centre sampling, is proposed, and its properties are evaluated in a design-based approach. The estimator is admissible, consistent and the design is measurable. The expressions of the variance of the population size estimator and of its unbiased sample estimator are also proposed. The strategy is applied both to a simulated population and to the data collected with a CATI survey on the users of some libraries of the University of Florence.
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