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[CTPP] American Community Survey Alert, Number 52 (SPECIAL NOTICE)

by Murakami

Some of you have already seen this, but I thought it was important to re-post to the CTPP list. The Census Bureau is asking for comments on data products for the ACS multiyear tabulation. The first release will use responses from 2005 thru 2007. The population threshold for 3-year accumulations from ACS is 20,000 persons, so data for many more counties and places will be available, compared to the 1-year ACS tabulations. Responses are due by September 27, 2007. Elaine Murakami FHWA Office of Planning 206-220-4460 -----Original Message----- From: acs-alert-admin(a)lists.census.gov [mailto:acs-alert-admin(a)lists.census.gov] On Behalf Of cheryl.v.chambers(a)census.gov Sent: Thursday, August 30, 2007 8:54 AM To: acs-alert(a)lists.census.gov Subject: [acs-alert] American Community Survey Alert, Number 52 (SPECIAL NOTICE) American Community Survey (ACS) Alert, Number 52 (released August 30, 2007) **Notice to all subscribers: We have updated the links to information released in "American Community Survey Alert, Number 51" (issued August 28, 2007). They are: Income, Poverty, and Earnings: http://www.census.gov/Press-Release/www/releases/archives/income_wealth/ 010583.html . Federal Register Notice on Proposed ACS Data Products Containing Multiyear Estimates: http://a257.g.akamaitech.net/7/257/2422/01jan20071800/edocket.access.gpo .gov/2007/E7-16850.htm . ___________________________________________________________________ The ACS is a key component of the Census Bureau's 2010 Decennial Census Program, which also consists of early planning and modernization of geographic operations and a short-form only for the 2010 Census. ___________________________________________________________________ ***Contact Us If you have questions or comments about the American Community Survey, please call (888) 346-9682 or e-mail cmo.acs(a)census.gov. If you choose to unsubscribe or change your list options, you may do so by visiting this site and entering your e-mail address at the bottom of the page under the ACS-Alert subscriber's section. This will take you to an options page where you may request your password, unsubscribe, or set other options. If you have questions about this list, please send a message to acs-alert-admin(a)lists.census.gov. _______________________________________________ acs-alert mailing list acs-alert(a)lists.census.gov http://lists.census.gov/mailman/listinfo/acs-alert

17 years, 11 months

[CTPP] TAZ delineation timeframes

by Murakami

Recently there have been a number of questions about when to delineate TAZs for the NEXT CTPP. We are working with the Census Bureau for TAZ submission for the next CTPP. They have not yet provided us with a cost estimate for the software. It will be a GIS-based approach, as the TAZ-UP process was in CTPP2000. We had a meeting on July 25, and the schedule for TAZ submission into TIGER is most likely going to begin January/Feb 2009. In the last CTPP Status Report http://www.fhwa.dot.gov/ctpp/sr0307.htm , we had slightly earlier dates (I think we said Fall of 2008). By starting a few months later, preliminary (not final) 2010 Census tract and block group boundaries will be available as references for TAZ definition. Many regional models are moving toward smaller and smaller TAZs. In one case, we heard that TAZs were planned to have an average of 120 households. Because the ACS sample size is so much smaller than the decennial census "long form" this might result in only 6-10 completed surveys for housing units, even after 5 years of sampling. We are concerned that the CB might require TAZ to have the same population thresholds as "block groups". The CB issued a Fed Reg notice about raising the population threshold for block groups from 600 to 1200. At today's meeting, the CB said they had gotten a lot of comments that people preferred the CB to keep the threshold at 600. TAZs that are submitted into TIGER for CTPP might need to aggregated your model zones, for example, two of your model TAZ = 1 Census TAZ, otherwise you might risk a lot of data suppression based on disclosure avoidance rules by the Census Bureau's Disclosure Review Board (DRB). We have a meeting set up for August 23 or 24 with the DRB which we hope will provide more insight on how they will consider the next CTPP. We are planning to discuss synthetic data approaches which may result in the ability to provide small TAZ summaries. The Census Bureau is concerned that releasing data for very small geographic units results in data with very large margins of error. They would prefer that larger geographic zones be tabulated to reduce the margin of error. Finally, just as a reminder-small area tabulation (like tracts and TAZ) from ACS is restricted to 5-year accumulation of sample records. Elaine Murakami FHWA Office of Planning 206-220-4460

18 years

Re: [CTPP] 2010 Proposed Criteria - Census Tract/Block Group Changes

by Bob Paddock

Yes. Just what the implications are for TAZs in 2010 appear to be uncertain. Robert J. Paddock Transportation Research Metropolitan Council 390 N. Robert Street St. Paul, MN 55101 651 602-1340

18 years, 1 month

[CTPP] 2010 Proposed Criteria - Census Tract/Block Group Changes

by John M. Sharp

Is anyone else scratching their heads on the 2010 proposed criteria for census tracts and block groups? Making the lowest level for census tracts 1,200 pop and the lowest for block groups 1,200 pop seems redundant. However, what concerns me are the amount of potential changes to the fundamental census geographic structure in 2010. In 1998/99 we sent our TAZ geography to the Census Bureau, so that it could be included in the development of the 2000 CTPP data. Only a few of our TAZs didn't match the Census Bureau's criteria for a TAZ (census block group boundary issues). Does anyone else think that we should wait to do CTPP/TAZ until "after" the 2010 Census? Due to the overhaul of block groups and possible changes in geography there is a great chance that we will have to redo many of our TAZ boundaries. This would be easier if we know the "new" geography. Any comments? Thanks, John John Sharp Program Coordinator Transportation Planning & Data Services 21 E. Main, Suite 100 Oklahoma City, OK 73104 Telephone: (405) 234-2264 FAX : (405) 234-2200 email: jmsharp(a)acogok.org Website: http://www.acogok.org <http://www.acogok.org/>

18 years, 1 month

[CTPP] CB Center for Economic Studies Discussion papers from Research Data Centers

by Murakami

As some of you know, we (the transportation data community) have not had much success using the CB's Research Data Center program that is housed at the Center for Economic Studies. We attempted to use the RDC to examine early ACS results. The RDCs provide researchers with access to confidential microdata and go through careful review before results are released to ensure that no confidential data are released. While glancing at the CES RDC website today, I noticed that several "discussion papers" over the past few years (2005 through current) have included analysis using the 1990 and 2000 decennial census "long form" data to examine patterns of home-to-work. 2004 ACS data are included on the list of available data at the RDC. Typically, these analyses focus on "labor market outcomes." http://www.ces.census.gov/index.php/ces/1.00/cmshome Here are a few that I found: Hellerstein, Judith K; David Neumark; and Melissa McInerney. "Spatial Mismatch or Racial Mismatch? " CES 07-16. June 2007. Job density and employment rates are compared between black and white population (no break-out for "Hispanic"), The authors use the term "racial mismatch" to mean a "lack of jobs into which blacks are hired," in contrast to "spatial mismatch" that argues that jobs are not located near to where people live contributing to lack of employment. They found that space alone plays a relatively minor role in low black male employment rates. They find that jobs that are "available to blacks" is more important, especially for workers with lower education. Wang, Qingfang "How does Geography Matter in Ethnic Labor Market Segmentation Process? A Case Study of Chinese in the San Francisco CMSA" CES-WP-07-09 March 2007 The authors defined Chinese residence and workplace concentrations in the San Francisco Bay area. They found clear market segmentation by gender and job skill among the Chinese immigrants. They assert that the housing market is limited for immigrant ethnic minorities, but that ethnic social networking will influence employment and therefore job location, beyond commute time considerations. The pattern for Chinese immigrant men and women is very different, with men in skilled computer and electronics jobs, and women in lower skilled factory and assembly line jobs. Bayer, Patrick; Stephen L. Ross, and Giorgio Topa. "Place of Work and Place of Residence: Informal Hiring Networks and Labor Market Outcomes." CES 05-23 October 2005. The 1990 Census "long form" data was used to measure social interaction by comparing the propensity of individuals living in the same vs. nearby blocks to work in the same location. They found that residing on the same block increased the probability of working together by over 33 percent. When the characteristics of persons (age, education and presence of children) matched, these interactions were even stronger. Fu, Shine. "Smart Café Cities: Testing Human Capital Externalities in the Boston Metropolitan Area." CES 05-24 October 2005. "Human Capital Externalities" or "knowledge spillover" are benefits that accrue to workers from being close to a dense skilled labor market. Most work done on these externalities have been at the macro-scale of metropolitan areas. This effort examines microgeographic scale of externalities by using census tracts, block groups and blocks. This paper used the 1990 Census long form data using worker and job characteristics and job location. They found that these benefits are very localized within microgeographic scales. So, the good news is that other people besides the transportation community have benefited from the detailed PLACE OF WORK geocoding in the Decennial Census "long form." What can we learn from this? To get projects approved in the CES RDC system, we would probably have better luck if we discussed our research in terms of economic productivity and labor market benefits, rather than benefiting transportation planning. Also, we can expect that researchers on labor market outcomes will want to use ACS results on place of work in the future. Elaine Murakami

18 years, 2 months

[CTPP] ACS 2006 Data Release Schedule

by Ed Christopher

See the link below for the 2006 ACS release schedule. -------------- The U.S. Census Bureau will release data from the 2006 American Community Survey (ACS) in August and September. This years data release marks the first time that group quarters (such as prisons, college dorms, military barracks and nursing homes) are included in the data products. Closer to the release date, the Census Bureau will provide guidance on making comparisons between annual ACS data products, as well as comparisons between ACS and Census 2000 data. Data will again be available for the nation, 50 states and the District of Columbia, Puerto Rico, every congressional district and all counties, places and metropolitan areas with populations of 65,000 or more. http://www.census.gov/Press-Release/www/releases/archives/american_communit… -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 19900 Governors Dr Olympia Fields, IL 60461

18 years, 2 months

Re: [CTPP] Vacancy Rates by quarter

by Richard Lin

Dear Marie, It is very simple: 1. HUD (by USPS): A unit is vacant only after mails had not been collected for 90 days. If the mails were picked up (collected) in 30 day for example, it is not a vacant unit. 2. ACS: On survey day, a unit is treated as a vacant unit if it is not occupied. A one-day definition by ACS compares to USPS's 90-day definition. ________________________________ Richard Lin, Ph.D. Demographer Colorado Department of Local Affairs Division of Local Government 1313 Sherman Street, Room 521 Denver, CO 80203 Phone: (303)866-4989 Fax:: (303)866-2660 richard.lin(a)state.co.us www.DOLA.Colorado.Gov >>> <mbousfield(a)cityofchicago.org> 6/19/2007 12:50 PM >>> I compared the HUD vacancy rates with the ACS vacancy rates. The former are low and the latter very high. Have others found this too and is there an explanation? Thanks, Marie Bousfield City of Chicago _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news

18 years, 2 months

Re: [CTPP] Vacancy Rates by quarter

by Richard Lin

Are you satisfied with a definition of vacant unit as "mails had not been collected for 90 days? ________________________________ Richard Lin, Ph.D. Demographer Colorado Department of Local Affairs Division of Local Government 1313 Sherman Street, Room 521 Denver, CO 80203 Phone: (303)866-4989 Fax:: (303)866-2660 richard.lin(a)state.co.us www.DOLA.Colorado.Gov >>> <alanpisarski(a)alanpisarski.com> 6/19/2007 10:28 AM >>> Big tourism payoff Sent via BlackBerry from Cingular Wireless -----Original Message----- From: <Nanda.Srinivasan(a)dot.gov> Date: Tue, 19 Jun 2007 11:58:06 To:<ctpp-news(a)chrispy.net> Subject: [CTPP] Vacancy Rates by quarter This is with regard to questions on vacancy rates by season. I recently had a chat with Jon Sperling at HUD (during a walk on the mall) and he pointed me to these datasets (acquired from USPS) that list vacancy rates for each census tract by quarter and year. http://www.huduser.org/datasets/usps.html <http://www.huduser.org/datasets/usps.html> I have not used these much, but am intrigued. The datasets are comparatively new (introduced in December 2006). HUD is looking for user feedback. I found that the data can be joined and easily plotted using a nationwide Census Tract shapefile. I can see quite a few applications in examining these data for transportation planning applications. Also see the data dictionary at http://www.huduser.org/datasets/usps/USPS_Data_Dictionary.pdf The contact person for these datasets is Robert Renner. Thank you Nanda Srinivasan _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news

18 years, 2 months

[CTPP] Vacancy Rates by quarter

by Nanda.Srinivasan＠dot.gov

This is with regard to questions on vacancy rates by season. I recently had a chat with Jon Sperling at HUD (during a walk on the mall) and he pointed me to these datasets (acquired from USPS) that list vacancy rates for each census tract by quarter and year. http://www.huduser.org/datasets/usps.html I have not used these much, but am intrigued. The datasets are comparatively new (introduced in December 2006). HUD is looking for user feedback. I found that the data can be joined and easily plotted using a nationwide Census Tract shapefile. I can see quite a few applications in examining these data for transportation planning applications. Also see the data dictionary at http://www.huduser.org/datasets/usps/USPS_Data_Dictionary.pdf The contact person for these datasets is Robert Renner <mailto:Robert.N.Renner(a)hud.gov> . Thank you Nanda Srinivasan

18 years, 2 months

RE: [CTPP] Brainstorming about INCOME variable for thefutureCTPP(using ACS records)

by Richard Lin

Dear Elaine, Thank you very much for the information. Now we expect better quality of the migration statistics from the 2008 ACS survey estimates and the Census 2010 census counts. ________________________________ Richard Lin, Ph.D. Demographer Colorado Department of Local Affairs Division of Local Government 1313 Sherman Street, Room 521 Denver, CO 80203 Phone: (303)866-4989 Fax:: (303)866-2660 richard.lin(a)state.co.us www.DOLA.Colorado.Gov >>> "Murakami, Elaine" <Elaine.Murakami(a)fhwa.dot.gov> 6/13/2007 2:14 PM >>> At the recent ACS Peer Exchange, sponsored by the FHWA/FTA Transportation Planning Capacity Building program, held May 10-11, 2007; Nancy Torrieri shared a paper copy of some of the question changes for the 2008 ACS content. I just noticed that Question 14 "Did this person live in this house or apartment 1 year ago?" has a NEW line for STREET ADDRESS, in addition to city/town; county; State; and zipcode. If respondents complete this line, then, coding to a "real" PUMA, not just to county should be possible. Elaine Murakami FHWA Office of Planning -----Original Message----- From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of mbousfield(a)cityofchicago.org Sent: Friday, June 08, 2007 8:52 AM To: Ed Christopher; Murakami, Elaine Cc: ctpp-news maillist; douglas.w.hillmer(a)census.gov Subject: RE: [CTPP] Brainstorming about INCOME variable for thefutureCTPP(using ACS records) To CTPP-News Maillist and Other Census Groupies, Much thanks to all who shared their migpuma concerns. The attached file defines the migpumas and the powpumas in function of the pumas (all 5%). I downloaded it from Blodgett's Mable database. For instance, for Illinois (17), the pumas 3501-3519 cover the City of Chicago and pumas 3401-3414 cover the remainder of Cook County which we call suburban Cook County. The file shows that powpuma 3500 coincides with the city of Chicago and that migpuma 3490 coincides with Cook County. We at the City defined the pumas but the definitions of the powpumas and migpumas were done by the CB. In 1990, Chicago was a migpuma but in 2000 the CB decided it was no longer. According to Clara, no county remainders were migpumas except Los Angeles city, why not Chicago city? I planned to extract the population sizes off all the migpumas and show that there are many migpumas that are smaller than the City of Chicago thereby showing a lack of equal access to data. According to "Principles and Practices for Federal Statistical Agencies" by Martin, Straf, and Citro, federal statistical agencies have to ensure equal access to data. Are large subcounty cities with concentrations of minority persons getting equal access to data? Thank you, Marie Bousfield, Demographer City of Chicago Department of Planning and Development City Hall, Room 1003 121 North LaSalle Street Chicago, Illinois 60602 Tel. (312) 744-6536 Fax. (312) 744-0759 Email mbousfield(a)cityofchicago.org http://www.cityofchicago.org _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news

18 years, 2 months

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