Exploring the big data paradox for various estimands using vaccination data from the global COVID-19 Trends and Impact Survey (CTIS)
Selection bias poses a challenge to statistical inference validity in non-probability surveys. This study compared estimates of the first-dose COVID-19 vaccination rates among Indian adults in 2021 from a large non-probability survey, COVID-19 Trends and Impact Survey (CTIS), and a small probability...
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Main Authors | , , , , , , |
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Format | Journal Article |
Language | English |
Published |
26.06.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Selection bias poses a challenge to statistical inference validity in
non-probability surveys. This study compared estimates of the first-dose
COVID-19 vaccination rates among Indian adults in 2021 from a large
non-probability survey, COVID-19 Trends and Impact Survey (CTIS), and a small
probability survey, the Center for Voting Options and Trends in Election
Research (CVoter), against benchmark data from the COVID Vaccine Intelligence
Network (CoWIN). Notably, CTIS exhibits a larger estimation error (0.39)
compared to CVoter (0.16). Additionally, we investigated the estimation
accuracy of the CTIS when using a relative scale and found a significant
increase in the effective sample size by altering the estimand from the overall
vaccination rate. These results suggest that the big data paradox can manifest
in countries beyond the US and it may not apply to every estimand of interest. |
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DOI: | 10.48550/arxiv.2306.14940 |