In Bolivia, the San Pedro Prison is governed completely by the inmates; guards simply ensure that no prisoners leave the facility. Despite this lack of government presence, the prison is safer than other Bolivian prisons and other self-governed prisons, like Andersonville prison camp. I argue in my paper on San Pedro, that the relative order is the result of inmates ability to operate businesses and own their own cells, which provide the resources necessary to invest in capital for protection and raise the cost of predatory behavior.
News reports indicate that Bolivian officials have begun cracking down on the prison. Inmate businesses are being shut down (including the inmate-run tours), ownership of cells is forbidden, and entrance to and exit from the prison is now tightly monitored (which will greatly reduce the extent of the market). The result will likely be greater violence and degradation.