Sequential adaptive strategies for sampling rare clustered populations

Fulvia Mecatti (), Charalambos Sismanidis, Emanuela Furfaro and Pier Luigi Conti
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Fulvia Mecatti: University of Milano-Bicocca
Charalambos Sismanidis: Global Tuberculosis Programme, WHO
Emanuela Furfaro: Università Cattolica del Sacro Cuore, Milano and University of California
Pier Luigi Conti: Sapienza Università di Roma

Statistical Methods & Applications, 2023, vol. 32, issue 5, No 10, 1659-1693

Abstract: Abstract A new class of sampling strategies is proposed that can be applied to population-based surveys targeting a rare trait that is unevenly spread over an area of interest. Our proposal is characterised by the ability to tailor the data collection to specific features and challenges of the survey at hand. It is based on integrating an adaptive component into a sequential selection, which aims both to intensify the detection of positive cases, upon exploiting the spatial clustering, and to provide a flexible framework to manage logistics and budget constraints. A class of estimators is also proposed to account for the selection bias, that are proved unbiased for the population mean (prevalence) as well as consistent and asymptotically Normal distributed. Unbiased variance estimation is also provided. A ready-to-implement weighting system is developed for estimation purposes. Two special strategies included in the proposed class are presented, that are based on the Poisson sampling and proved more efficient. The selection of primary sampling units is also illustrated for tuberculosis prevalence surveys, which are recommended in many countries and supported by the World Health Organisation as an emblematic example of the need for an improved sampling design. Simulation results are given in the tuberculosis application to illustrate the strengths and weaknesses of the proposed sequential adaptive sampling strategies with respect to traditional cross-sectional non-informative sampling as currently suggested by World Health Organisation guidelines.

Keywords: Over-sampling; Poisson sampling; Informative designs; Pseudo Horvitz-Thompson estimator; Asymptotics; Budget and logistic constraints; Intra-cluster variation (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10260-023-00707-z

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