These are county total records for the 1990 School District Databook (SDDB). They are taken by the NBER from the SDDB files as provided by NARA with a slight change in format, and not recalculated from the lower level data provided in the same files. Since school district boundaries may cross county boundaries, that would not be strictly possible anyway.

More information is available at http://www.nber.org/sddb

There should be XXXX records in each file, one for each county plus the District of Columbia. However, there are missing and duplicated records listed in www.nber.org/sddb/counties.html I do not know if the duplicate records have similar data, or if one or more of them might be records missing from other counties. It is known that a portion of the Minnesota file is defective. Please be cautious about using these files without detailed examination, and please inform me of anything of interest that you learn.

feenberg at nber.org
12 April 2002