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Title: IMPROVEMENT OF DECENNIAL CENSUS SMALL-AREA EMPLOYMENT DATA: NEW METHODS TO ALLOCATE UNGEOCODABLE WORKERS
Accession Number: 00737951
Record Type: Component
Availability: Find a library where document is available Abstract: The Southeast Michigan Council of Governments (SEMCOG), like any other agency involved in general and transportation planning, makes extensive, continuous use of decennial census data products. Standard products meet most of SEMCOG's data needs. When they do not, special tabulations have been purchased from the Census Bureau. In connection with SEMCOG's latest forecast, special tabulations of 1980 and 1990 census data were obtained, each including a tabulation of housing units and households by traffic analysis zone (TAZ) of residence and a tabulation of workers by TAZ of work. The worker data included a cross-tabulation by industrial class and occupational class. In response to puzzling industrial class mixes at the TAZ level found earlier in the Census Transportation Planning Package (CTPP), the special tabulations separated geocoded workers from allocated workers. (The Census Bureau uses worker allocation to assign tract and block numbers to workers whose workplace addresses cannot be geocoded to tract and block.) Subsequent mapping of geocoded workers by TAZ evidenced high quality, but allocated workers showed questionable distributions. SEMCOG decided to develop its own reallocation method that accepted Census Bureau county assignment, geocoded or allocated, and place geocoding. The method was applied to workers needing allocation, using as a base the workers geocoded to tract and block by detailed industrial class and occupational class. A comparison of TAZ employment by detailed industrial class demonstrates that workers reallocated by SEMCOG replicate the Census Bureau geocoded pattern much better than do workers allocated by the Census Bureau. A new, comprehensive allocation method is proposed for the 2000 census. The new method would combine features of the current Census Bureau allocation and SEMCOG reallocation methods, and add the demarcation of commuting origin and destination areas.
Supplemental Notes: Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Accession #: 00737947
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Limoges, EPagination: p. 33-46
Publication Date: 1997
Conference:
Decennial Census Data for Transportation Planning: Case Studies and Strategies for 2000
Location:
Irvine, California ISBN: 0309059704
Features: Figures
(9)
; References
(2)
TRT Terms: Identifier Terms: Old TRIS Terms: Subject Areas: Data and Information Technology; Highways; Planning and Forecasting; Public Transportation; I72: Traffic and Transport Planning
Files: TRIS, TRB
Created Date: Jun 17 1997 12:00AM
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