Abstract #301515

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JSM 2003 Abstract #301515
Activity Number: 476
Type: Contributed
Date/Time: Thursday, August 7, 2003 : 10:30 AM to 12:20 PM
Sponsor: Section on Government Statistics
Abstract - #301515
Title: Nonsampling Error in the New Cycle of the Weekly EIA Gasoline Price Survey
Author(s): Benita J. O'Colmain*+ and Paula E. Weir and Tracy Churchill and Pedro J. Saavedra
Companies: Macro International, Inc. and Energy Information Administration and Macro International, Inc. and ORC Marco
Address: 2806 Jutland Rd., Kensington, MD, 20895-2840,
Keywords: differential response rates ; data quality ; frame coverage ; nonresponse bias
Abstract:

The EIA weekly gasoline price survey is a survey that produces estimates of national and regional level gasoline pump prices, as well as separate estimates for select states and cities, two formulations and three grades of gasoline. An expansion of the survey to include more city estimates required a frame and sample redesign. The sample was redesigned, moving from a multi-phase sample design that used a monthly survey as phase I, to an area sample which selects counties and uses a commercial establishment-level frame. This frame allows direct selection of stations that previously were selected by the sampled company's corporate office, i.e., a change in the sampling unit. This study examines contact rates, refusals and frame errors by region, State and outlet affiliation. For further study, a small sample of outlets was selected and visited in person to determine directly the price of gasoline. These data were used to evaluate frame error, compare the prices of respondents and non-respondents, and verify the prices provided by the participating stations.

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