U.S. Census Bureau

This paper reports the results of research and analysis undertaken by the U.S. Census Bureau staff. It has undergone a Census Bureau review more limited in scope than that given to official Census Bureau publications. The use of data not generated by the U.S. Census Bureau precludes performing the same statistical reviews on those data which the U.S. Census Bureau does on its own data. This report is released to inform interested parties of ongoing research and to encourage discussion of work in progress.