[CTPP] Release of Census 2000 Data Product on Daytime Population

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.