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Softwood Lumber: Technical Documentation
The data in this release are compiled from the U.S. import merchandise trade statistics. To maintain confidentiality, the Census Bureau applies statistical procedures to protect the identity of any business or individual. The data in this release contain nonsampling error but do not contain sampling error. Data users who create their own estimates using data from these tables should cite the Census Bureau as the source of the original data only. For the full technical documentation, including definitions of terms, see below.
The data in this release are a complete enumeration of documentation
collected by the U.S. Customs and Border Protection (CBP) and are not
subject to sampling error. Quality assurance procedures are performed
at every stage of collection, processing and tabulation of the information.
The data are still subject to nonsampling errors, which include reporting
errors, undocumented shipments, timeliness, data capture errors, and errors
in low value estimation. For more information on these types of errors
please see the Information on Goods and Services section of the FT900
- U.S. International Trade in Goods and Services, page 26.
The Census Bureau recommends that data users incorporate this information
into their analyses, as nonsampling error could impact the conclusions
drawn from the results.
The data in this release are limited to Canadian softwood lumber shipments subject to the bilateral Softwood Lumber Agreement (2006 SLA) signed by the governments of the United States and Canada. These data are a summary of softwood lumber shipments where the filer has provided a valid export permit number issued by the government of Canada. Shipments containing invalid permit numbers or inconsistencies between the permit number, the region of origin, or the Harmonized Tariff Commodity Code are not included in this release. The data in this release are not revised. Additionally, certain softwood lumber commodities subject to the SLA 2006 currently do not have quantity filing requirements, and will be excluded from this release until such requirements can be established. As a result, the softwood lumber import data may be understated.
For softwood lumber imports originating in British Columbia, filers are
expected to specify whether the shipment originated in Coastal British
Columbia or Interior British Columbia, as these shipments will be tallied
separately. Additionally, some filers may identify shipments as originating
in British Columbia without specifying the region. These shipments will
be included in this release under a third designation – British
Columbia Unspecified. Over time and with proper filer adherence to reporting
procedures, this designation may become obsolete.
The Census Bureau has modified or suppressed some data in this release
to protect confidentiality. Title 13 United States Code, Section 9, prohibits
the Census Bureau from publishing results in which an individual's or
business' data can be identified. For more information on how the Census
Bureau protects the confidentiality of data, see the disclosure limitation
topics listed below as appropriate.
Disclosure limitation is the process for protecting the confidentiality
of data. A disclosure of data occurs when published statistical information
identifies either an individual or business that has provided information
under a pledge of confidentiality. The techniques used by the Census Bureau
to protect confidentiality in tabulations vary, depending on the type
Source: FTDWebMaster, Foreign
Trade Division, U.S. Census Bureau, Washington, D.C. 20233
Location: MAIN: REFERENCE: GUIDES
Created: 21 November 2005
Last modified: 12 July 2011 at 04:02:25 PM