One of the first surveys of sannyasins was conducted in 1980 at the Poona ashram by Swami Krishna Deva (David Berry Knapp), an American clinical psychologist who would later serve as mayor of Rajneeshpuram [REF].
A survey of 635 Rajneeshpuram residents was conducted in 1983 by Norman D. Sundberg, director of the University of Oregon's Clinical/Community Psychology Program, and three of his colleagues.