Re: [CTPP] Brainstorming about INCOME variable for the future CTPP(using ACS records)

To CTPP-News Maillist and Other Census Groupies, Comments about Elaine Murakami’s email and Ed Christopher’s email both dated 5/31/07 with subject: [Brainstorming] about income variable…. Elaine lists four presumed-wanted flows: county to county, place to place, county to place, and place to county. These are insufficient for many subregional analyses when the principal city is part of one or more counties. In these cases, we need city to county remainder data and county remainder to city data. In 1980 and 1990, the City of Chicago was a migpuma This allowed us to do city to county remainder and county remainder to city analyses. For instance, using the PUMS file we analyzed inmigration and outmigration by characteristic between the City of Chicago and its suburbs. In 2000, the City of Chicago was not a migpuma even though many smaller areas were migpumas. The Census Bureau person Ms. Showalter told me that no city of any size was a migpuma unless it coincided with one or more counties such as the City of New York. As a consequence, we were not able to determine in and outmigration between the City of Chicago and the suburbs for the 1995-2000 period. In the future ACS-PUMS are large cities like the City of Chicago identified as migpumas and powpumas? I noticed that the 2004 ACS PUMS has only MIGSTATE (allowing to determine the state of origin of movers.) Can we please restore large cities as migpumas and powpumas and identify the pumas, migpumas, and powpumas on the ACS-PUMS. On their website, the Census Bureau claims that the ACS-PUMS file is used for academic research. But my experience as a city demographer shows that the PUMS files are very important tools in city management. Please help if you are in a position to do so. Thank you, Marie Bousfield, Demographer City of Chicago Department of Planning and Development City Hall, Room 703 121 North LaSalle Street Chicago, Illinois 60602 Tel. (312) 744-6536 Fax. (312) 744-0759 Email mbousfield(a)cityofchicago.org http://www.cityofchicago.org