Thanks Sam! I am interested in identifying systematic issues so that approaches to improve the overall quality of the data can be made. The recent discussions here, and on the lehd-ltd listserv have indicated a problem with School Districts and employment at individual schools. Glad to hear that Ohio has improved the ES-202 file to address this! I would like to know if there are other industry categories that have similar problems and what approaches to solving the problem have worked! The Multiple Worksite Report http://www.bls.gov/cew/cewmwr00.htm is a VOLUNTARY component of the QCEW/ES-202 program. There are 2 papers that may be of interest to you, linked to the FHWA Census page: http://www.fhwa.dot.gov/planning/census/lehd.htm Early research sponsored by the Bureau of Transportation Statistics examined data from Florida and Illinois. Results for Illinois found that the LED 2001 data had much fewer shares of people working in their county of residence compared to ACS. Please see the paper by Wende Mix presented at the 2005 TRB Conference on Census Data for Transportation Planning. This was attributed to over-assignment to headquarters locations. Another early paper which discussed multiple worksite businesses (also linked to the FHWA website) is by Julia Lane and Marc Roemer which indicates that there are 2 main issues: 1) a business is NOT identified as having multiple sites, and 2) even if the business is identified as having multiple sites, the list of those sites may be incomplete. Lastly, just as a reminder, the universe of the QCEW/ES-202 is different from Census or ACS household surveys. 1. QCEW does not include self-employed. LEHD program is exploring use of Census Business Register to add self-employed. In the Census 2000, about 10% of workers reported they were self-employed. 2. QCEW does not include military or federal government or postal workers. LEHD program is working with OPM to get federal employees included. 3. The coverage in the Agriculture & Mining sectors is not always complete depending on the state. 4. LEHD data count both jobs and workers. LEHD uses the "primary" job concept, i.e. the job with the highest earnings in each quarter, to assign a single workplace geography to a worker. I hope I am not sounding negative about LEHD! I think it has a lot of potential, after more data cleaning particularly with multiple site businesses at the front end, and integration with additional files. Elaine Murakami FHWA Office of Planning 206-220-4460 (in Seattle) ------------------------------------------------------------------------ - For those of you who didn't already know, the US Dept of Education maintains a national geo-codable database of K-12 schools at http://nces.ed.gov/ccd/ (go to Data Resources>Build A Table), where you can select a particular geographic area and fields include both school lat/lon and geocodable street address. I've used this site on several occasions to supplement ES202 data to geocode education employment throughout the state of Ohio and for multi-state metro areas. FYI, our ES202 employment agency in this state beginning in 2005 switched from coding all public K-12 employment to the district administrative offices to the individual schools. Sam Granato Ohio DOT, Office of Technical Services 1980 W. Broad Street, Columbus, OH 43223 Phone: 614-644-6796, Fax: 614-752-8646 "You can observe a lot just by watching." - Yogi Berra