Thanks Ben. Sure wish we knew a little more about the whole thing. Last I heard
Differential Privacy did not work with sample data. They must have figured that out.
On Aug 15, 2019, at 2:46 PM, Benjamin Gruswitz
Apologies, that last email wasn't meant to be directed to this group.
What I DID want to pass along, if some had not seen it, was this update on the topic of
differential privacy. It appears the push back from the IPUMS community and others lead to
a Census Bureau decision to delay implementation for the ACS until 2025.
Ben Gruswitz, AICP | Senior Planner
Office of Long-Range Planning
Delaware Valley Regional Planning Commission
190 N Independence Mall West, 8th Floor
Philadelphia, PA 19106-1520
215.238.2882 | www.dvrpc.org
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> On Thu, Aug 15, 2019 at 3:31 PM Benjamin Gruswitz <bgruswitz(a)dvrpc.org> wrote:
> Thanks, I was so confused.
> Ben Gruswitz, AICP | Senior Planner
> (Pronouns: he/him)
> Office of Long-Range Planning
> Delaware Valley Regional Planning Commission
> 190 N Independence Mall West, 8th Floor
> Philadelphia, PA 19106-1520
> 215.238.2882 | www.dvrpc.org
> Subscribe | Facebook | Twitter | Instagram | LinkedIn | YouTube
>> On Thu, May 2, 2019 at 12:51 PM Ed Christopher <edc(a)berwyned.com> wrote:
>> There may be some who are interested in this. I apologize if it has already
crossed your desk.
>> -------- Forwarded Message --------
>> Subject: Sign our open letter to Census Bureau leadership about ACS data
>> Date: Thu, 2 May 2019 16:05:03 +0000
>> From: Steven Ruggles <ipums(a)umn.edu>
>> Reply-To: Steven Ruggles <ipums(a)umn.edu>
>> To: edc(a)berwyned.com
>> IPUMS Census and Survey Data
>> Is this email not displaying correctly? View it in your browser.
>> Dear IPUMS User,
>> I know many of you have been following developments in Census 2020 and the
proposed citizenship questions. Several sessions at the Population Association of America
(PAA) covered many aspects of Census 2020 planning and were well-attended with lively
discussions. I’m writing to you today about plans for the American Community Survey (ACS).
Please join me in asking the Census Bureau to clarify their plans for ACS disclosure
avoidance control and dissemination. We want to protect the usability of the important
public use data that we all use in our work.
>> Here's the short version: please sign our open letter to the Census Bureau
asking for transparency in changes to the ACS. For the long version, please keep reading
and visit our webpage on this topic.
>> The Census Bureau is planning an extensive revision of procedures for ensuring
the confidentiality of public use data, based on a method known as "differential
privacy." The new disclosure avoidance system will rely on injecting noise into the
data, and the new procedures may reduce or even eliminate the usability of public use data
for many common research and policy applications. For more information, see our recent
working paper and forthcoming article.
>> The American Community Survey (ACS) is the single most important statistical
source in the social sciences. They generate 9,000 articles a year, and a new paper
appears about every hour. If these data become unusable, unreliable or available only
through restricted-access environments because of the new confidentiality measures, that
would have profound consequences across many areas of demographic, economic, and policy
>> Acknowledging the importance of the ACS data, we are seeking clarification and
engagement with the research community from the Census Bureau. Our open letter requests:
>> A public timeline for changes to the ACS summary files and microdata.
>> Engagement with the research community in advance of any changes.
>> Public versions of new noise-infused ACS summary files and microdata for
2005-2017 so that researchers can assess their usefulness by replicating existing
>> If you support these requests, please sign our letter.
>> Thank you,
>> Steven Ruggles
>> IPUMS Director
>> Regents Professor of History and Population Studies
>> IPUMS | University of Minnesota
>> Copyright © 2019 University of Minnesota, All rights reserved.
>> Our mailing address is:
>> 225 19th Ave South
>> Minneapolis, MN 55455