I need to know who makes and how the desicion to stay on a Indian reservation if I know who I could search for how they decide. stumped please help.

It's a free country. No native HAS to stay on the reservation. Initially the natives were rounded up and forced to stay there. Now that is not the case (thankfully)

Please read:
http://en.wikipedia.org/wiki/Indian_reservation

Many residents of reservations stay because they want to live in their own culture. Also -- some are now starting their own businesses and encouraging tourism. These sites give several reasons why people stay on the reservations.

http://www.indians.org/articles/native-american-artifacts.html

http://www.digitalhistory.uh.edu/native_voices/voices_display.cfm?id=101

http://www.ewebtribe.com/NACulture/