Substance use research in the United States has focused on ethnicity/r
ace to the detriment of studying the role of nonethnic sociocultural f
actors. Reliance on politically defined ethnic categories has not adde
d to knowledge on the etiology, prevalence, prevention, or treatment o
f substance use and misuse. Rather it has reflected the preoccupation
with race/ethnicity in the larger United States society and has contri
buted to further stereotyping of non-European ethnic groups. Ethnicity
serves as a proxy for a number of sociocultural factors (e.g., socioe
conomic status) that are linked to substance use. To make progress in
understanding substance use and misuse, researchers must move away fro
m the simplistic reliance on ethnic labels to a more complex understan
ding of the impact of the sociocultural variables that such labels rep
resent.