This study uses 1990 data from seventy-three American Indian tribes to explore factors associated with the adoption of indi genous economic development plans on American Indian reservations. The analyses employing ordinary least squares analytical models posit that the existence of tribally owned and controlled businesses on or near the reservations and the presence of tribally owned farm and ranch operations are most critical in explaining the existence of such plans. A closer scrutiny of this result further suggests that the effect (...) of tribal ownership and control of businesses is more pronounced than that of the existence of a tribally owned farm and ranch operation. The wider implications for comprehensive Indian policy are noted. (shrink)