Abstract #300879

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JSM 2003 Abstract #300879
Activity Number: 12
Type: Topic Contributed
Date/Time: Sunday, August 3, 2003 : 2:00 PM to 3:50 PM
Sponsor: Section on Survey Research Methods
Abstract - #300879
Title: The 2002 Commodity Flow Survey Sample Design Process
Author(s): Ruth E. Detlefsen*+ and Jock R. Black and William C. Davie
Companies: U.S. Census Bureau and U.S. Census Bureau and U.S. Census Bureau
Address: 5106 Durand St., Temple Hills, MD, 20748-4655,
Keywords: stratification ; sample design ; establishment survey
Abstract:

The Commodity Flow Survey, sponsored by the U.S. Census Bureau and the Bureau of Transportation Statistics, is conducted once every five years to provide data on the flow of commodities by various transportation modes. For the 2002 survey, several different sample design options were considered to address funding uncertainties. The goal was to design a sample of fewer than 100,000 establishments (the size of the 1997 survey) that would enable us to publish estimates by geographic areas, transportation modes, and commodities similar to those used in the 1997 publication. We investigated the feasibility of samples of size 10, 30, and 50 thousand establishments. We evaulated whether it was better to explicitly stratify by metropolitan area or to select a systematic sample from a frame of establishments sorted by metropolitan area. We augmented the sample to increase the likelihood that a smaller sample would still capture shipments for the less prominent transportation modes. We evaluated the effects of proposed design changes on the number and quality of published estimates. This paper details research conducted to arrive at the final sample design.

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