[CTPP] ACS 2005-2007 Population Estimates

[Levin, Jeffrey]

San Francisco successfully challenged the Census Population Estimates,
eliminating about half the discrepancy between Census estimate and DOF.
 
See  http://www.sfgov.org/site/mayor_index.asp?id=94792
 


_________________________________
Jeffrey P. Levin (jplevin at oaklandnet.com)
Housing Policy & Programs Coordinator
City of Oakland/Community & Economic Development Agency
250 Frank Ogawa Plaza, 5th Floor
Oakland, CA 94612
510/238-6188   FAX: 510/238-3691
http://www.oaklandnet.com/government/hcd 

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________________________________

	From: wendell cox [mailto:demographia at gmail.com] 
	Sent: Thursday, June 25, 2009 2:54 PM
	To: ctpp-news at chrispy.net
	Cc: Levin, Jeffrey
	Subject: Re: [CTPP] ACS 2005-2007 Population Estimates
	
	
	Do not know the issue you are raising, however, Calif Dept of
Finance estimates are high on municipal populations of SF and LA... by a
large margin... this is in comparison to the annual Census Bureau
estimates (which may or may not be related to ACS).
	
	
	On Thu, Jun 25, 2009 at 9:28 PM, Shimon Israel
<SIsrael at mtc.ca.gov> wrote:
	

		For ACS 2005-2007 population and housing
occupancy/vacancy estimates, are people finding discrepancies between
ACS and other data sources, particularly in sub-county geographies?  ACS
estimates are controlled at the county level and, like the ACS 1-year
data, ACS 2005-2007 population estimates are showing disagreement with
other data sources.  For example, the Oakland 3-year ACS estimate shows
the population at 372,000, when CA Dept. of Finance estimates are over
400,000.  This runs counter to the on-the-ground anecdotal experience -
ACS shows a loss of 30,000 people during a period that showed an
increase of 10,000 housing units.
		
		Will the decennial census correct this?   My
understanding is that Census 2010 numbers will be used to control 2010
ACS characteristic data.  There will need to be some adjustment,
however, given that the decennial census benchmarks population at April
1, and ACS uses a July 1 population number.   It's also my understanding
that population estimates for 2001-2009 will be updated, though
retroactive adjustments for ACS characteristics will not be done.  Does
anyone else know something different about this?
		
		Other thoughts about this?
		
		Thanks,
		
		Shimon
		
	
---------------------------------------------------------------
		Shimon Israel
		Associate Transportation Planner/Analyst
		Metropolitan Transportation Commission
		101 Eighth Street
		Oakland, CA 94607-4700
		(510) 817-5839 (office)
		(510) 817-5848 (fax)
	
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	Wendell Cox
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Missouri-Illinois metropolitan region
	Visiting Professor, Conservatoire National des Arts et Metiers,
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