[gis_info] FW: Please take action to save the ACS 3-year data products

DENOUDEN Bob * DAS Bob.DENOUDEN at oregon.gov
Thu Mar 5 08:17:53 PST 2015

For those of you who rely on Census ACS 3-year data products, this message will be of interest.


Bob DenOuden, GISP
Oregon GIS Framework Coordinator
DAS/CIO Geospatial Enterprise Office
155 Cottage St. NE, 4th Floor
Salem, OR 97301
office: (503) 378-3157 cell: (503) 428-4892


-----Original Message-----
From: NHGIS Project [mailto:nhgis=umn.edu at mail68.wdc03.rsgsv.net] On Behalf Of NHGIS Project
Sent: Wednesday, March 04, 2015 5:36 AM
To: Anderson, Carl G NFG NG ORARNG (US)
Subject: [EEMSG: Marketing]Please take action to save the ACS 3-year data products

National Historical Geographic Information System

Is this email not displaying correctly? View it in your browser <http://nhgis.us4.list-manage2.com/track/click?u=775cbf39c77535e784cdfd6f9&id=e0467c4461&e=bea7a252f3> .

Please take action to save the ACS 3-year data products.

The U.S. Census Bureau plans to discontinue the 3-year American Community Survey (ACS) data products <http://nhgis.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&id=22237ab622&e=bea7a252f3>  as a cost-saving maneuver. Although the Census Bureau will continue to provide 1-year and 5-year ACS products, significant data will be lost.

The 3-year data provide a unique combination of spatial, temporal, and statistical precision, enabling a range of high-value analyses that the other ACS products cannot support. With a sample three times larger than 1-year ACS data, 3-year estimates have considerably smaller margins of error and are made available for nearly twice as many areas. Compared to 5-year data, 3-year data provide a degree of specificity that is crucial for some time series comparisons. The 3-year estimates may be used to analyze pre-recession (2005-2007), recession (2008-2010), and post-recession (2011-2013) characteristics of population and housing, summarizing shorter time periods than 5-year data and smaller areas (with at least 20,000 people) than 1-year data (with at least 65,000 people).

If you believe as I do that this change would significantly harm the nation's statistical infrastructure, you should make your feelings known by email:

*	Email James Treat, Chief of the American Community Survey Office, at james.b.treat at census.gov, and tell him how this elimination will negatively impact your research. Please be as specific as possible!
*	Email Katherine K. Wallman, Chief Statistician of the US Office of Management and Budget (OMB) at Katherine_K._Wallman at omb.eop.gov, and tell her how this cut will negatively impact your research. The OMB must approve the spending plan proposed by the Census Bureau.

For more details on the proposed discontinuation and how it would impact research, please see these posts:

*	The ACS 3-year Demographic Estimates Are History http://nhgis.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&id=a2c953d3e6&e=bea7a252f3
*	Opportunities to Provide Input Regarding the Proposed Elimination of ACS 3-year Data Products http://nhgis.us4.list-manage1.com/track/click?u=775cbf39c77535e784cdfd6f9&id=60b7094f2d&e=bea7a252f3 
*	Census to Eliminate 3-year Estimates <http://nhgis.us4.list-manage1.com/track/click?u=775cbf39c77535e784cdfd6f9&id=7c0afd2388&e=bea7a252f3> 

If policy-makers, academics, and students explain why these data are important, we may save this critical element of the nation's statistical infrastructure. I urge you to send your comments to james.b.treat at census.gov and Katherine_K_Wallman at omb.eop.gov  and copy us at nhgis at umn.edu.

Thank you,

Steven Ruggles <http://nhgis.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&id=32832cfd12&e=bea7a252f3>
President, Population Association of America Regents Professor, University of Minnesota Director, Minnesota Population Center

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