U.S. Census Bureau
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STATISTICAL METHODOLOGY



Brief descriptions of the survey methods of the e-commerce estimates are given below. Comprehensive details of coverage, sample design and estimation methodology for the surveys are described in the corresponding publications.

 
 • Annual Survey of Manufactures (ASM)
 
 • Annual Trade Survey (ATS)
 
 • Service Annual Survey (SAS)
 
 • Annual Retail Trade Survey (ARTS)
 
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