Detecting and Treating Verified Influential Values in a Monthly Retail Trade Survey

Mulry Mary H. (), Oliver Broderick E. () and Kaputa Stephen J. ()
Additional contact information
Mulry Mary H.: U.S. Census Bureau, Washington, DC 20233, U.S.A.
Oliver Broderick E.: U.S. Census Bureau, Washington, DC 20233, U.S.A.
Kaputa Stephen J.: U.S. Census Bureau, Washington, DC 20233, U.S.A.

Journal of Official Statistics, 2014, vol. 30, issue 4, 721-747

Abstract: In survey data, an observation is considered influential if it is reported correctly and its weighted contribution has an excessive effect on a key estimate, such as an estimate of total or change. In previous research with data from the U.S. Monthly Retail Trade Survey (MRTS), two methods, Clark Winsorization and weighted M-estimation, have shown potential to detect and adjust influential observations. This article discusses results of the application of a simulation methodology that generates realistic population time-series data. The new strategy enables evaluating Clark Winsorization and weighted M-estimation over repeated samples and producing conditional and unconditional performance measures. The analyses consider several scenarios for the occurrence of influential observations in the MRTS and assess the performance of the two methods for estimates of total retail sales and month-to-month change.

Keywords: Outlier; Winsorization; M-estimation (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:vrs:offsta:v:30:y:2014:i:4:p:27:n:8

DOI: 10.2478/jos-2014-0045

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