Presented by:

Nathaniel Schenker

Thursday, June 14, 2001

Abstract

In 1997, the Office of Management and Budget issued a revised standard for the collection of race information within the federal statistical system. One revision in this standard allows individuals to choose more than one race group when responding to federal surveys and other federal data collections. This talk will explore methods that impute single-race categories for those who have given multiple-race responses. Such imputations would be useful when it is desired to conduct analyses involving only single-race categories, such as when trends over time are being examined by race group so that data collected under the old and new standards are being combined. 

The National Health Interview survey has allowed multiple-race responses for several years, while also asking respondents to specify one race as their "main" race.  Exploratory analyses of data from the survey suggest that imputation methods that use demographic and contextual covariate information to predict the main race can have advantages with respect to lower bias and improved variance estimation compared to simpler methods discussed by the Office of Management and Budget. It also appears, however, that the relationships between the main race and covariates might be changing over time. Thus, caution should be exercised if an imputation model fitted to data from one time period is to be applied to data from another time period.