6 Mar
2009
6 Mar
'09
11:37 a.m.
Dear Everyone:
Today, the Census Bureau issued this Federal Register notice. The
5-year ACS is the first ACS product for small area geography, e.g.
census tracts and block groups. I have extracted KEY POINTS that will
GREATLY IMPACT data availability for transportation tables and result in
a lot of DATA SUPPRESSION at the tract and block group level. As this
FR was just issued today, we have not had a chance to estimate the
amount of suppression that would occur given these proposed conditions.
We are currently working on profile sheets using the 2005-2007 ACS
(3-year data) that was released in December 2008. We are finding many
tables to be suppressed. So, even with the population threshold of
20,000 for the 3-year ACS data, there is considerable suppression on the
current ACS standard table production, at least those tables of key
interest to transportation planners.
As most of you know, the first CTPP using ACS is a planned 3-year
accumulation from ACS 2006-2008. The table list will be re-submitted by
AASHTO to the Census Bureau in a few weeks.
The next CTPP product is envisioned as a 5-year accumulation from ACS
2006-2010. Because of the many rules the CB has established to protect
individual confidentiality not just for the ACS Standard tables, but
also for custom tabulations like the CTPP, we believe that the 5-year
CTPP for small area tabulation (e.g. TAZs) will need to rely on
synthetic data generated inside the CB using the ACS microdata records.
_________________________________________________________
*Federal Register Notice: The 5-Year ACS Data Products Release Plan
Today the U.S Census Bureau published its data release plan for the ACS
5-year data products in the Federal Register (E9-4803). Beginning in
late 2010, the Census Bureau plans to introduce 5-year data products
covering the January 2005 through December 2009 data collection period.
The release of the 5-year estimates will achieve the goal of the ACS to
provide small area data similar to the long-form sample data published
after Census 2000.
The Census Bureau is proposing to modify its current line of data
products to accommodate the 5-year estimates and is requesting comments
from current and potential users of ACS data products to help guide this
modification.
We invite you to review the 5-Year ACS Data Release Plan and provide
your response to the contact listed in the Federal Register notice.
Please follow this link to the Federal Register notice (PDF files)
posted in the Highlights section on the ACS Main page:
http://www.census.gov/acs/www/
Comments are due to the contact listed in the Federal Register notice by
April 20, 2009
From the Census Bureau's pdf document:
2. Detailed tables with more than 100 cells cannot be released at the
block group level.
5. For the Selected Population Profiles, there must be at least 50
unweighted sample cases
over the 5-year period in the universe (specific population subgroup) in
a given
geographic area for the profile to be released.
6. For workplace tables, there must be at least 50 unweighted or 300
weighted workers in
sample over the 5-year period in a given workplace for the table to be
released.
7. For the residence and workplace tables where means of transportation
(mode) is crossed
with one or more other variables, there must be at least three
unweighted workers in
sample for each transportation mode in a given place for the table to be
released.
Otherwise the data must be collapsed or suppressed and complementary
suppression must
be applied. There is no threshold on univariate tables.
Elaine Murakami
FHWA Office of Planning
elaine.murakami(a)dot.gov
Note: please update my contact information. My previous email address
will likely expire on March 11.
206-220-4460
6 Mar
6 Mar
12:24 p.m.
The new Administration's policies seem to be directed towards more openess and
transparency with respect to federal information - in many cases completely reversing the
more restrictive policies imposed by the previous Administration. Does this pose an
opportunity to revive the questions/arguments made by the CTPP users' community in
opposition to the disclosure rules promulgated after the 2000 Census?
I don't particularly like the notion of more politicization for the Census Bureau, but
I like even less (especially as a small metro area) being denied access to transportation
planning data that accounts for the uniqueness of individual communities and travel
patterns. Perhaps if we again raised this issue starting now, we might get some or all of
the less restrictive rules restored before the 2010 Census begins and certainly before the
time that a full Census-based CTPP would become available.
Do others have any thoughts/opinions about such an approach?
Bill Moore, M.ITE, MPO Administrator
City of Pueblo - Urban Transportation Planning Division
PACOG MPO/TPR
223 N Santa Fe Avenue, Pueblo, CO 81003
Phone: 719-553-2945 FAX: 719-553-2950
E-mail: bmoore@pueblo.us<mailto:bmoore@pueblo.us> Web:
www.PACOG.net<http://www.pacog.net/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This e-mail transmission (including any attachments) may contain information that is
confidential and legally privileged. It is intended for the use of the addressee only.
If you received this e-mail in error, please contact us immediately by telephone at
719-553-2951 or by return e-mail, and delete this message from your computer. If you are
not the intended recipient, please be advised that any dissemination, distribution, or
copying of this e-mail is strictly prohibited.
-----Original Message-----
From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net]On Behalf Of
Murakami, Elaine
Sent: Friday, March 06, 2009 10:38 AM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] CB Federal Register Notice: ACS 5-year data products proposal
Dear Everyone:
Today, the Census Bureau issued this Federal Register notice. The 5-year ACS is the
first ACS product for small area geography, e.g. census tracts and block groups. I have
extracted KEY POINTS that will GREATLY IMPACT data availability for transportation tables
and result in a lot of DATA SUPPRESSION at the tract and block group level. As this FR
was just issued today, we have not had a chance to estimate the amount of suppression that
would occur given these proposed conditions.
We are currently working on profile sheets using the 2005-2007 ACS (3-year data) that was
released in December 2008. We are finding many tables to be suppressed. So, even with
the population threshold of 20,000 for the 3-year ACS data, there is considerable
suppression on the current ACS standard table production, at least those tables of key
interest to transportation planners.
As most of you know, the first CTPP using ACS is a planned 3-year accumulation from ACS
2006-2008. The table list will be re-submitted by AASHTO to the Census Bureau in a few
weeks.
The next CTPP product is envisioned as a 5-year accumulation from ACS 2006-2010. Because
of the many rules the CB has established to protect individual confidentiality not just
for the ACS Standard tables, but also for custom tabulations like the CTPP, we believe
that the 5-year CTPP for small area tabulation (e.g. TAZs) will need to rely on synthetic
data generated inside the CB using the ACS microdata records.
_________________________________________________________
*Federal Register Notice: The 5-Year ACS Data Products Release Plan
Today the U.S Census Bureau published its data release plan for the ACS 5-year data
products in the Federal Register (E9-4803). Beginning in late 2010, the Census Bureau
plans to introduce 5-year data products covering the January 2005 through December 2009
data collection period. The release of the 5-year estimates will achieve the goal of the
ACS to provide small area data similar to the long-form sample data published after Census
2000.
The Census Bureau is proposing to modify its current line of data products to accommodate
the 5-year estimates and is requesting comments from current and potential users of ACS
data products to help guide this modification.
We invite you to review the 5-Year ACS Data Release Plan and provide your response to the
contact listed in the Federal Register notice. Please follow this link to the Federal
Register notice (PDF files) posted in the Highlights section on the ACS Main page:
http://www.census.gov/acs/www/
Comments are due to the contact listed in the Federal Register notice by April 20, 2009
From the Census Bureau’s pdf document:
2. Detailed tables with more than 100 cells cannot be released at the block group level.
5. For the Selected Population Profiles, there must be at least 50 unweighted sample
cases
over the 5-year period in the universe (specific population subgroup) in a given
geographic area for the profile to be released.
6. For workplace tables, there must be at least 50 unweighted or 300 weighted workers in
sample over the 5-year period in a given workplace for the table to be released.
7. For the residence and workplace tables where means of transportation (mode) is crossed
with one or more other variables, there must be at least three unweighted workers in
sample for each transportation mode in a given place for the table to be released.
Otherwise the data must be collapsed or suppressed and complementary suppression must
be applied. There is no threshold on univariate tables.
Elaine Murakami
FHWA Office of Planning
elaine.murakami(a)dot.gov
Note: please update my contact information. My previous email address will likely expire
on March 11.
206-220-4460
________________________________
This e-mail transmission (including any attachments) contains information that is
confidential and may be legally privileged. It is intended for the use of the addressee
only. If you received this e-mail in error, we request that you contact us immediately by
telephone or return e-mail, and that you delete this message from your computer. If you
are not the intended recipient, please be advised that any dissemination, distribution, or
copying of this e-mail is strictly prohibited.
1:24 p.m.
Re: opportunities to express opposition to disclosure rules.
Nancy Reger (nreger(a)morpc.org) suggested in February that the
Transportation user community prepare a letter to whoever is appointed
as the Census Bureau Director.
LINK to the CTPP listserv archive:
http://www.chrispy.net/pipermail/ctpp-news/
Whether individual MPOs, state DOTs, AMPO, NARC, or AASHTO , or any
other organization, want to convey these issues to the CB is UP TO YOU!
I will be talking to my FHWA chain-of-command to determine if FHWA
(and/or FTA and BTS) will submit an official response from USDOT.
And, just to make it clear, since the 2010 Census is a short-form only
Census, future CTPP will NOT use the 2010 Census. It will use multiple
years of accumulated ACS records. And, after the 2010 Census, the ACS
weights should be adjusted to closely match the 2010 Census results.
Elaine Murakami
elaine.murakami(a)dot.gov
Note: please update my contact information. My previous email address
will likely expire on March 11.
206-220-4460
________________________________
From: ctpp-news-bounces(a)chrispy.net
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Bill Moore
Sent: Friday, March 06, 2009 10:24 AM
To: 'ctpp-news(a)chrispy.net'
Subject: RE: [CTPP] CB Federal Register Notice: ACS 5-year data
productsproposal
The new Administration's policies seem to be directed towards more
openess and transparency with respect to federal information - in many
cases completely reversing the more restrictive policies imposed by the
previous Administration. Does this pose an opportunity to revive the
questions/arguments made by the CTPP users' community in opposition to
the disclosure rules promulgated after the 2000 Census?
I don't particularly like the notion of more politicization for the
Census Bureau, but I like even less (especially as a small metro area)
being denied access to transportation planning data that accounts for
the uniqueness of individual communities and travel patterns. Perhaps
if we again raised this issue starting now, we might get some or all of
the less restrictive rules restored before the 2010 Census begins and
certainly before the time that a full Census-based CTPP would become
available.
Do others have any thoughts/opinions about such an approach?
Bill Moore, M.ITE, MPO Administrator
City of Pueblo - Urban Transportation Planning Division
PACOG MPO/TPR
223 N Santa Fe Avenue, Pueblo, CO 81003
Phone: 719-553-2945 FAX: 719-553-2950
E-mail: bmoore(a)pueblo.us <mailto:bmoore@pueblo.us> Web:
www.PACOG.net <http://www.pacog.net/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This e-mail transmission (including any attachments) may contain
information that is confidential and legally privileged. It is intended
for the use of the addressee only. If you received this e-mail in
error, please contact us immediately by telephone at 719-553-2951 or by
return e-mail, and delete this message from your computer. If you are
not the intended recipient, please be advised that any dissemination,
distribution, or copying of this e-mail is strictly prohibited.
-----Original Message-----
From: ctpp-news-bounces(a)chrispy.net
[mailto:ctpp-news-bounces@chrispy.net]On Behalf Of Murakami, Elaine
Sent: Friday, March 06, 2009 10:38 AM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] CB Federal Register Notice: ACS 5-year data
products proposal
Dear Everyone:
Today, the Census Bureau issued this Federal Register notice.
The 5-year ACS is the first ACS product for small area geography, e.g.
census tracts and block groups. I have extracted KEY POINTS that will
GREATLY IMPACT data availability for transportation tables and result in
a lot of DATA SUPPRESSION at the tract and block group level. As this
FR was just issued today, we have not had a chance to estimate the
amount of suppression that would occur given these proposed conditions.
We are currently working on profile sheets using the 2005-2007
ACS (3-year data) that was released in December 2008. We are finding
many tables to be suppressed. So, even with the population threshold
of 20,000 for the 3-year ACS data, there is considerable suppression on
the current ACS standard table production, at least those tables of key
interest to transportation planners.
As most of you know, the first CTPP using ACS is a planned
3-year accumulation from ACS 2006-2008. The table list will be
re-submitted by AASHTO to the Census Bureau in a few weeks.
The next CTPP product is envisioned as a 5-year accumulation
from ACS 2006-2010. Because of the many rules the CB has established to
protect individual confidentiality not just for the ACS Standard tables,
but also for custom tabulations like the CTPP, we believe that the
5-year CTPP for small area tabulation (e.g. TAZs) will need to rely on
synthetic data generated inside the CB using the ACS microdata records.
_________________________________________________________
*Federal Register Notice: The 5-Year ACS Data Products Release
Plan
Today the U.S Census Bureau published its data release plan for
the ACS 5-year data products in the Federal Register (E9-4803).
Beginning in late 2010, the Census Bureau plans to introduce 5-year data
products covering the January 2005 through December 2009 data collection
period. The release of the 5-year estimates will achieve the goal of
the ACS to provide small area data similar to the long-form sample data
published after Census 2000.
The Census Bureau is proposing to modify its current line of
data products to accommodate the 5-year estimates and is requesting
comments from current and potential users of ACS data products to help
guide this modification.
We invite you to review the 5-Year ACS Data Release Plan and
provide your response to the contact listed in the Federal Register
notice. Please follow this link to the Federal Register notice (PDF
files) posted in the Highlights section on the ACS Main page:
http://www.census.gov/acs/www/
Comments are due to the contact listed in the Federal Register
notice by April 20, 2009
From the Census Bureau's pdf document:
2. Detailed tables with more than 100 cells cannot be released
at the block group level.
5. For the Selected Population Profiles, there must be at least
50 unweighted sample cases
over the 5-year period in the universe (specific population
subgroup) in a given
geographic area for the profile to be released.
6. For workplace tables, there must be at least 50 unweighted or
300 weighted workers in
sample over the 5-year period in a given workplace for the table
to be released.
7. For the residence and workplace tables where means of
transportation (mode) is crossed
with one or more other variables, there must be at least three
unweighted workers in
sample for each transportation mode in a given place for the
table to be released.
Otherwise the data must be collapsed or suppressed and
complementary suppression must
be applied. There is no threshold on univariate tables.
Elaine Murakami
FHWA Office of Planning
elaine.murakami(a)dot.gov
Note: please update my contact information. My previous email
address will likely expire on March 11.
206-220-4460
________________________________
This e-mail transmission (including any attachments) contains
information that is confidential and may be legally privileged. It is
intended for the use of the addressee only. If you received this e-mail
in error, we request that you contact us immediately by telephone or
return e-mail, and that you delete this message from your computer. If
you are not the intended recipient, please be advised that any
dissemination, distribution, or copying of this e-mail is strictly
prohibited.
8 Mar
8 Mar
4:08 p.m.
New subject: CB Federal Register Notice: ACS 5-year data products proposal
Bill--I would hope that folks take a "good hard look" at what is
happening with the ACS proposed standard products. The impact in the
loss of data is really a lot larger than one might expect. Over the
next few days I hope to look at and revisit some of the impact analysis
we did on many of these disclosure rules. While we looked at the rules
from the perspective of how they would affect our special 3-year
CTPP-like product, many of the new 5-year rules are exactly the same.
Which by the way are even more restrictive than the CTPP2000 rules.
As for what people should do we can ALL start by acting like the good
planners we are and help develop and provide the necessary information
and data to help inform and frame the debate/discussion. One important
thing is that we need to do, is to make sure that those who need to
know, and who use the data, know what they will be getting. Things have
certainly changed with the elimination of the decennial long form. I am
not sure if the people who need to know really realize (and understand)
what they will (or not) be getting.
In a broader sense there are some major policy questions lurking behind
all of this. For example, to satisfy the Title 13 confidentiality
requirements how much confidentiality protection is enough? We do know
that an absolute zero risk of disclosure would mean not releasing
anything. But how much risk can we accept? How close to zero does it
have to be? When AASHTO appealed the the rules for the 3-year CTPP-like
product an analysis done by Westat put the risk close to zero but that
was not acceptable. The Census Bureau has always maintained that the
law is clear on this but is it really?
http://trbcensus.com/drb/cb_response_09192008.pdf
-
Bill Moore wrote:
The new Administration's policies seem to be
directed towards more openess and transparency with respect to federal information - in
many cases completely reversing the more restrictive policies imposed by the previous
Administration. Does this pose an opportunity to revive the questions/arguments made by
the CTPP users' community in opposition to the disclosure rules promulgated after the
2000 Census?
I don't particularly like the notion of more politicization for the Census Bureau,
but I like even less (especially as a small metro area) being denied access to
transportation planning data that accounts for the uniqueness of individual communities
and travel patterns. Perhaps if we again raised this issue starting now, we might get
some or all of the less restrictive rules restored before the 2010 Census begins and
certainly before the time that a full Census-based CTPP would become available.
Do others have any thoughts/opinions about such an approach?
Bill Moore, M.ITE, MPO Administrator
City of Pueblo - Urban Transportation Planning Division
PACOG MPO/TPR
223 N Santa Fe Avenue, Pueblo, CO 81003
Phone: 719-553-2945 FAX: 719-553-2950
E-mail: bmoore@pueblo.us<mailto:bmoore@pueblo.us> Web:
www.PACOG.net<http://www.pacog.net/>
-----Original Message-----
From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net]On Behalf Of
Murakami, Elaine
Sent: Friday, March 06, 2009 10:38 AM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] CB Federal Register Notice: ACS 5-year data products proposal
Dear Everyone:
Today, the Census Bureau issued this Federal Register notice. The 5-year ACS is the
first ACS product for small area geography, e.g. census tracts and block groups. I have
extracted KEY POINTS that will GREATLY IMPACT data availability for transportation tables
and result in a lot of DATA SUPPRESSION at the tract and block group level. As this FR
was just issued today, we have not had a chance to estimate the amount of suppression that
would occur given these proposed conditions.
We are currently working on profile sheets using the 2005-2007 ACS (3-year data) that was
released in December 2008. We are finding many tables to be suppressed. So, even with
the population threshold of 20,000 for the 3-year ACS data, there is considerable
suppression on the current ACS standard table production, at least those tables of key
interest to transportation planners.
As most of you know, the first CTPP using ACS is a planned 3-year accumulation from ACS
2006-2008. The table list will be re-submitted by AASHTO to the Census Bureau in a few
weeks.
The next CTPP product is envisioned as a 5-year accumulation from ACS 2006-2010. Because
of the many rules the CB has established to protect individual confidentiality not just
for the ACS Standard tables, but also for custom tabulations like the CTPP, we believe
that the 5-year CTPP for small area tabulation (e.g. TAZs) will need to rely on synthetic
data generated inside the CB using the ACS microdata records.
_________________________________________________________
*Federal Register Notice: The 5-Year ACS Data Products Release Plan
Today the U.S Census Bureau published its data release plan for the ACS 5-year data
products in the Federal Register (E9-4803). Beginning in late 2010, the Census Bureau
plans to introduce 5-year data products covering the January 2005 through December 2009
data collection period. The release of the 5-year estimates will achieve the goal of the
ACS to provide small area data similar to the long-form sample data published after Census
2000.
The Census Bureau is proposing to modify its current line of data products to accommodate
the 5-year estimates and is requesting comments from current and potential users of ACS
data products to help guide this modification.
We invite you to review the 5-Year ACS Data Release Plan and provide your response to the
contact listed in the Federal Register notice. Please follow this link to the Federal
Register notice (PDF files) posted in the Highlights section on the ACS Main page:
http://www.census.gov/acs/www/
Comments are due to the contact listed in the Federal Register notice by April 20, 2009
From the Census Bureau’s pdf document:
2. Detailed tables with more than 100 cells cannot be released at the block group level.
5. For the Selected Population Profiles, there must be at least 50 unweighted sample
cases
over the 5-year period in the universe (specific population subgroup) in a given
geographic area for the profile to be released.
6. For workplace tables, there must be at least 50 unweighted or 300 weighted workers in
sample over the 5-year period in a given workplace for the table to be released.
7. For the residence and workplace tables where means of transportation (mode) is
crossed
with one or more other variables, there must be at least three unweighted workers in
sample for each transportation mode in a given place for the table to be released.
Otherwise the data must be collapsed or suppressed and complementary suppression must
be applied. There is no threshold on univariate tables. Elaine Murakami
FHWA Office of Planning
elaine.murakami(a)dot.gov
_______________________________________________
ctpp-news mailing list
ctpp-news(a)chrispy.net
http://www.chrispy.net/mailman/listinfo/ctpp-news
--
Ed Christopher
708-283-3534 (V)
708-574-8131 (cell)
FHWA RC-TST-PLN
19900 Governors Dr
Olympia Fields, IL 60461
6 Mar
6 Mar
3:39 p.m.
Elaine,
I'm in DC, having attended today's COPAFS meeting, and so am not in a
position to print and read this FR notice. I will do it on Monday.
However, a key issue is that the Census Bureau had promised, years
ago, not to have any suppression in the 5 year products; otherwise,
they would not "be the same as" the census long form. If this FR
notice says otherwise, all hell is going to break loose.
Patty Becker
Quoting "Murakami, Elaine" <Elaine.Murakami(a)fhwa.dot.gov>ov>:
Dear Everyone:
Today, the Census Bureau issued this Federal Register notice. The
5-year ACS is the first ACS product for small area geography, e.g.
census tracts and block groups. I have extracted KEY POINTS that will
GREATLY IMPACT data availability for transportation tables and result in
a lot of DATA SUPPRESSION at the tract and block group level. As this
FR was just issued today, we have not had a chance to estimate the
amount of suppression that would occur given these proposed conditions.
We are currently working on profile sheets using the 2005-2007 ACS
(3-year data) that was released in December 2008. We are finding many
tables to be suppressed. So, even with the population threshold of
20,000 for the 3-year ACS data, there is considerable suppression on the
current ACS standard table production, at least those tables of key
interest to transportation planners.
As most of you know, the first CTPP using ACS is a planned 3-year
accumulation from ACS 2006-2008. The table list will be re-submitted by
AASHTO to the Census Bureau in a few weeks.
The next CTPP product is envisioned as a 5-year accumulation from ACS
2006-2010. Because of the many rules the CB has established to protect
individual confidentiality not just for the ACS Standard tables, but
also for custom tabulations like the CTPP, we believe that the 5-year
CTPP for small area tabulation (e.g. TAZs) will need to rely on
synthetic data generated inside the CB using the ACS microdata records.
_________________________________________________________
*Federal Register Notice: The 5-Year ACS Data Products Release Plan
Today the U.S Census Bureau published its data release plan for the ACS
5-year data products in the Federal Register (E9-4803). Beginning in
late 2010, the Census Bureau plans to introduce 5-year data products
covering the January 2005 through December 2009 data collection period.
The release of the 5-year estimates will achieve the goal of the ACS to
provide small area data similar to the long-form sample data published
after Census 2000.
The Census Bureau is proposing to modify its current line of data
products to accommodate the 5-year estimates and is requesting comments
from current and potential users of ACS data products to help guide this
modification.
We invite you to review the 5-Year ACS Data Release Plan and provide
your response to the contact listed in the Federal Register notice.
Please follow this link to the Federal Register notice (PDF files)
posted in the Highlights section on the ACS Main page:
http://www.census.gov/acs/www/
Comments are due to the contact listed in the Federal Register notice by
April 20, 2009
From the Census Bureau's pdf document:
2. Detailed tables with more than 100 cells cannot be released at the
block group level.
5. For the Selected Population Profiles, there must be at least 50
unweighted sample cases
over the 5-year period in the universe (specific population subgroup) in
a given
geographic area for the profile to be released.
6. For workplace tables, there must be at least 50 unweighted or 300
weighted workers in
sample over the 5-year period in a given workplace for the table to be
released.
7. For the residence and workplace tables where means of transportation
(mode) is crossed
with one or more other variables, there must be at least three
unweighted workers in
sample for each transportation mode in a given place for the table to be
released.
Otherwise the data must be collapsed or suppressed and complementary
suppression must
be applied. There is no threshold on univariate tables.
Elaine Murakami
FHWA Office of Planning
elaine.murakami(a)dot.gov
Note: please update my contact information. My previous email address
will likely expire on March 11.
206-220-4460
5528
days inactive
5530
days old
4 comments
4 participants
participants (4)
-
Bill Moore -
Ed Christopher -
Murakami, Elaine -
pbecker＠umich.edu