Release of Census 2000 Data Product on Daytime Population - ctpp-news

20 Oct 2005

This is a message sent to the State Data Center listserv this morning,
10/20/05:

FROM THE DESK OF STANLEY J. ROLARK
CHIEF, CUSTOMER LIAISON OFFICE

October 20, 2005

Subject:                Release of Census 2000 Data Product on
                        Daytime Population

The Census Bureau will be releasing later today or tomorrow, Census
2000
data on the daytime population.  The data are being released for all
counties (or co. equivs.) by state in the U.S. There are also subtotal
lines for each state and for the U.S. as a whole. There are data for
the
municipios in Puerto Rico, and a total for Puerto Rico.

There are data for places (incorp. and CDPs) in the U.S. by state, but
no
place data for Puerto Rico. The universe is places with either 2,500
workers living in the place or 2,500 workers working in the place.

There will be three separate Excel files. They will be accessible
through
the Subjects A to Z index, from a link entitled Daytime Population.

   Table 1 is a summary for places by size. All places > 250,000 are
shown,
   in three size classes. Places less than 250,000 are shown in six
size
   classes, but only the first twenty based on percent increase in
daytime
   pop are shown for each size in Table 1.

   Table 2 shows all counties by state in the U.S. and Puerto Rico.

   Table 3 shows places with 2,500 workers living in or working in, by
   state, for the U.S. (not PR).

The data product was developed by the Journey to Work and Migration
Statistics Branch in Population Division. The data were developed by
combining the Census 2000 data on the residence population with the
Census
2000 sample data on place of work. The estimates of daytime population
to
be released by the Census Bureau only adjust resident populations for
travel into or out of an area for work purposes. No adjustment is made
for
travel to school, shopping, recreation, tourism, health care or for
any
other trip purpose. The data sources required for making these
adjustments
are not available on a consistent, nationwide basis. Furthermore, the
adjustments to resident population reflected in these "daytime"
population
estimates do not take the time of day work trips are made into account.
The
simplifying assumption is made that all workers leave the area in the
morning and return to the area in the evening.

The release will include data items on the number of workers working in
the
area, the number of workers living in the area, the estimated daytime
population, the number and percent change due to commuting, the number
and
percent of the workers who lived in the area that also worked in the
area,
and the employment-residence ratio (workers working in/workers living
in).

The data are likely to be released with a press release but with no
press
embargo.  While you will be receiving a copy of the press release as
part
of our normal procedures, I did want to provide you with a "heads
up" about
this release as you may receive questions and/or have an interest in
this
release.  Census Bureau contact information regarding this release will
be
included at the top of the press release.