Dr. Mannheim contributed information on the causes of language shift from Quechua to Spanish in the Andes:
Several factors, including discrimination, have contributed to the decline of Quechua, particularly in urban areas, said Bruce Mannheim, professor of anthropology at the University of Michigan.
"Quechua speakers in urban areas make sure their children speak Spanish," he said. "And their grandchildren only speak Spanish.…Among the different languages, there are a number of them that are threatened with extinction within this generation."