When we talk about initiatives and referenda, we're usually talking about states and localities. But other governments use ballot measures as well. Large universities and their student governments often permit initiatives and referenda. And then there's Indian country.

As they gain wealth and political power, Native American tribes are putting more and more questions up for a vote of their members. Here's an account of a referendum held by the Pawnee Nation to determine whether the tribe should establish its own separate judiciary.