There was a panel session on SCF data imputation issues at the 1997 ACCI meeting.
Example of imputation in the 1995 SCF, contributed by Jie Qin, University of Missouri-Columbia
X5909 Are you Native American, Asian, Hispanic, black, white, or another race?
(SHOW CARD 16)
1. Native American/Eskimo/Aleut
2. Asian or Pacific Islander
3. Hispanic
4. Black or African-American
5. White
-7. Other