The United States brought this action alleging that the Hazelwood School District and various officials were engaged in a "pattern or practice" of teacher employment discrimination in violation of Title VII of the Civil Rights Act of 1964. The district court ruled that the government had failed to establish a pattern or practice of discrimination. The court of appeals reversed, in part on the ground that the trial court's analysis of statistical data rested on an irrelevant comparison of black teachers to black pupils in Hazelwood instead of a comparison of black teachers in Hazelwood to black teachers in the relevant labor market areas, which it found to consist of St. Louis County and the city of St. Louis. The Court found that the court of appeals erred in disregarding the statistical data in the record dealing with Hazelwood's hiring after it became subject to Title VII and the court should have remanded the case to the district court for further findings as to the relevant labor market areas and for the ultimate determination whether Hazelwood has engaged in a pattern or practice of employment discrimination. (Author/IRT)