Results 1 to 10 of about 3,197 (211)

Combining Probability and Nonprobability Samples by Using Multivariate Mass Imputation Approaches with Application to Biomedical Research [PDF]

open access: yesStats, 2023
Nonprobability samples have been used frequently in practice including public health study, economics, education, and political polls. Naïve estimates based on nonprobability samples without any further adjustments may suffer from serious selection bias.
Sixia Chen   +2 more
exaly   +5 more sources

Descriptive inference using large, unrepresentative nonprobability samples: An introduction for ecologists. [PDF]

open access: yesEcology, 2023
AbstractBiodiversity monitoring usually involves drawing inferences about some variable of interest across a defined landscape from observations made at a sample of locations within that landscape. If the variable of interest differs between sampled and nonsampled locations, and no mitigating action is taken, then the sample is unrepresentative and ...
Boyd RJ, Stewart GB, Pescott OL.
europepmc   +7 more sources

A causal inference framework for poststratification: a method for improving external validity in epidemiological studies [PDF]

open access: yesBMC Medical Research Methodology
Background Poststratification, a method for improving the representativeness of nonprobability samples, has developed primarily within survey methodology.
Yeon Woo Oh   +4 more
doaj   +2 more sources

Online Nonprobability Samples

open access: yesAnnual Review of Sociology
Online nonprobability samples provide social scientists with opportunities to conduct surveys and experiments on large, diverse samples at modest prices. Researchers may find bewildering the options offered by the many commercial entities that provide research participants, and our review seeks to orient researchers to key issues about their use.
Jeremy Freese
exaly   +2 more sources

Combining Probability and Nonprobability Samples on an Aggregated Level

open access: yesJournal of Official Statistics
Probability surveys are experiencing important drawbacks nowadays: costs are relatively high and participation rates are decreasing, which could yield less accurate estimates. Alternatively, nonprobability samples like administrative records are having a rise in popularity due to their convenience and low costs.
Sander Scholtus, Ton de Waal
exaly   +2 more sources

occAssess: An R package for assessing potential biases in species occurrence data

open access: yesEcology and Evolution, 2021
Species occurrence records from a variety of sources are increasingly aggregated into heterogeneous databases and made available to ecologists for immediate analytical use. However, these data are typically biased, i.e.
Robin J. Boyd   +3 more
doaj   +1 more source

Comparing Probability-Based Surveys and Nonprobability Online Panel Surveys in Australia: A Total Survey Error Perspective

open access: yesSurvey Research Methods, 2022
In this paper we report the findings from our study which was undertaken to learn if the findings of Chang et al. (2009), Yeager et al. (2011), Erens et al. (2014), MacInnis et al. (2018) and Cornesse et al. (2020) would be replicated in Australia.
Paul John Lavrakas   +3 more
doaj   +1 more source

Polling India via regression and post-stratification of non-probability online samples.

open access: yesPLoS ONE, 2021
Recent technological advances have facilitated the collection of large-scale administrative data and the online surveying of the Indian population. Building on these we propose a strategy for more robust, frequent and transparent projections of the ...
Roberto Cerina, Raymond Duch
doaj   +1 more source

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