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<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT color=#0000ff>The
Census Bureau has posted two errata notices on AGE in ACS PUMS (# 50 (Dec 2009)
and # 47 (April 2009)). </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT color=#0000ff><A
href="http://www.census.gov/acs/www/UseData/Errata.htm">http://www.census.gov/acs/www/UseData/Errata.htm</A></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT
color=#0000ff>Another paper examined PUMA level age/sex, race and Hispanic
origin was presented at 2009 JSM.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT
color=#0000ff>"Evaluating the Age Dimension at the PUMA level in the 3-year
Estimates from the ACS" </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT
color=#0000ff>Joseph J. Salvo, Arun Peter Lobo, Adam L Willett, and Joel A.
Alvarez</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=866575216-03022010><FONT color=#0000ff>New
York City Department of City Planning</FONT></SPAN></DIV>
<DIV dir=ltr align=left> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff><A
href="http://www.amstat.org/meetings/JSM/2009/onlineprogram/index.cfm?fuseaction=abstract_details&abstractid=303441"><FONT
face=Arial
size=2>http://www.amstat.org/meetings/JSM/2009/onlineprogram/index.cfm?fuseaction=abstract_details&abstractid=303441</FONT></A><FONT
face=Arial><FONT size=2> </FONT></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff><FONT face=Arial><FONT
size=2></FONT></FONT></FONT> </DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT face=Arial size=2><SPAN
class=866575216-03022010>They found (in comparisons based on independent
estimates using a cohort-component model (fertility, mortality, 1990-2000
migration rates) </SPAN></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT face=Arial size=2><SPAN
class=866575216-03022010>skewed sex ratios for the age group 0-4, and
overestimation of the total population of population over 65.
</SPAN></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT face=Arial size=2><SPAN
class=866575216-03022010>"As a reults, the ACS estimates (for age 65 and over)
are significantly higher than DCP projections- by 15 percent for males and 12
percent for females."</SPAN></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2></FONT></FONT> </DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2>T<SPAN
class=866575216-03022010>he last paragraph in the paper reads:
</SPAN></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2><SPAN
class=866575216-03022010></SPAN></FONT></FONT> </DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2><SPAN
class=866575216-03022010>"Producing sub-county estimates by age/sex, race and
Hispanic origin would be a major undertaking, especially in light of the recent
past, when county estimates were sometimes questionable. But this
formidable challenge needs to be met if the ACS is to be a true replacement for
the decennial census long form."</SPAN></FONT></FONT></DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2><SPAN
class=866575216-03022010></SPAN></FONT></FONT> </DIV>
<DIV dir=ltr align=left><FONT size=+0><FONT size=2><SPAN
class=866575216-03022010>Elaine</SPAN></FONT></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> ctpp-news-bounces@chrispy.net
[mailto:ctpp-news-bounces@chrispy.net] <B>On Behalf Of </B>Krishnan
Viswanathan<BR><B>Sent:</B> Wednesday, February 03, 2010 5:42 AM<BR><B>To:</B>
ctpp-news@chrispy.net<BR><B>Subject:</B> [CTPP] Inaccurate age and sex data in
the Census PUMS files:Evidence and Implications<BR></FONT><BR></DIV>
<DIV></DIV>This paper might be of interest to people on this list. The paper is
here: <A
href="http://bpp.wharton.upenn.edu/betseys/papers/Inaccurate%20Age%20and%20Sex%20Data%20in%20Census%20PUMS%20Files.pdf">http://bpp.wharton.upenn.edu/betseys/papers/Inaccurate%20Age%20and%20Sex%20Data%20in%20Census%20PUMS%20Files.pdf</A>
<DIV><BR></DIV>
<DIV>From the abstract:<BR>
<DIV><BR></DIV>
<DIV>
<DIV><SPAN class=Apple-style-span
style="FONT-SIZE: 13px; LINE-HEIGHT: 18px; FONT-FAMILY: Tahoma, Calibri, Verdana, Helvetica, Arial, sans-serif; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px">"We
discover and document errors in public use microdata samples ("PUMS files") of
the 2000 Census, the 2003-2006 American Community Survey, and the 2004-2009
Current Population Survey. For women and men ages 65 and older, age- and
sex-specific population estimates generated from the PUMS files differ by as
much as 15% from counts in published data tables. Moreover, an analysis of labor
force participation and marriage rates suggests the PUMS samples are not
representative of the population at individual ages for those ages 65 and over.
PUMS files substantially underestimate labor force participation of those near
retirement ages and overestimate labor force participation rates of those at
older ages. These problems were an unintentional by-product of the
misapplication of a newer generation of disclosure avoidance procedures carried
out on the data. The resulting errors in the public use data could significantly
impact studies of people ages 65 and older, particularly analyses of variables
that are expected to change by age."</SPAN></DIV>
<DIV><FONT class=Apple-style-span
face="Tahoma, Calibri, Verdana, Helvetica, Arial, sans-serif"><SPAN
class=Apple-style-span
style="LINE-HEIGHT: 18px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px"><BR
clear=all><FONT class=Apple-style-span face=arial><SPAN class=Apple-style-span
style="LINE-HEIGHT: normal; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px"><BR></SPAN></FONT></SPAN></FONT></DIV>
<DIV><BR>-- <BR>Krishnan Viswanathan<BR>1101 High Meadow Dr<BR>Tallahassee FL
32311<BR><BR></DIV></DIV></DIV></BODY></HTML>