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<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>Frank, Elaine, Pete and
others all gave spot-on assessments. Thank you!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>I’m a frequent ACS
PUMS user -- so I’ll contribute what I’ve noticed as I’ve
compared ACS PUMS 1-Year datasets vs ACS PUMS 3-Year. The microdata at
record-level should be almost identical. You should see the same numbers of
records, and also almost identical data taken from respondent questionnaires.
One exception would be: where the coding of responses has changed (for example,
the coding of “YearBuilt” changed after 2005). <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>Beyond that –
another exception – Bureau-assigned data elements could change. Most
notably, you can detect slight adjustments to the weights applied to individual
household and person records. This happens for the reason described by Pete –
the updating of annual population totals.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>Whether you’re
working with PUMS or summary data, the Bureau’s tweaking of annual population
totals should be fairly small… for now… <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>The really big series
break will be in 2011 – when the decennial Census reveals just how far
off those annual estimates have been, which should cascade over into a re-benchmarking
of ACS 1-Year, 3-Year, and 5-Year tables published in Fall 2011.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>Consider: The Census
Bureau has estimated <st1:State w:st="on"><st1:place w:st="on">Minnesota</st1:place></st1:State>'s
2007 population at 5,182,000. Meanwhile, the Minnesota State Demographer
and Metropolitan Council also publish annual estimates (our official numbers
for State government purposes), putting <st1:State w:st="on"><st1:place w:st="on">Minnesota</st1:place></st1:State>'s
2007 population at 5,263,000, or 1.6% higher. This is not a small
discrepancy – and I strongly suspect that the Bureau’s efforts to
make everything fit leads to seriously unreliable housing occupancy (vacancy)
rates in a lot of counties and cities.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>Can I ask: Do FSCPE analysts
in other states see similar discrepancies between the Bureau’s annual
estimates and “alternative” (State Demographer) annual estimates or
annual projections?? Very curious to know.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'>-- Todd Graham<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'> Metropolitan
Council Research<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'> 651/602-1322<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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