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).<br>
<br><div class="gmail_quote">On Thu, Jun 25, 2009 at 9:28 PM, Shimon Israel <span dir="ltr">&lt;<a href="mailto:SIsrael@mtc.ca.gov">SIsrael@mtc.ca.gov</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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.<br>

<br>
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&#39;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?<br>

<br>
Other thoughts about this?<br>
<br>
Thanks,<br>
<br>
Shimon<br>
<br>
---------------------------------------------------------------<br>
Shimon Israel<br>
Associate Transportation Planner/Analyst<br>
Metropolitan Transportation Commission<br>
101 Eighth Street<br>
Oakland, CA 94607-4700<br>
(510) 817-5839 (office)<br>
(510) 817-5848 (fax)<br>
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