How well can IRS count the population

This study explores the extent to which data developed by the U.S. Internal Revenue Service for tax analysis purposes can be used to prepare population estimates. "First we will demonstrate how administrative records can be used to compute a population estimate. Then we will discuss the reliability of this estimate. Next we will compare estimates from our data base classified by age sex and state to results from the 1990 Census. And finally we will summarize our conclusions and make some recommendations for further research." (EXCERPT)