"Most informed students of the system have concluded that if bail is successfully to be done away with, as it largely has been in federal criminal justice as well as some localities, other practices and devices need to fill its place, many of which fall under the heading of pre-trial services. These may include aids and algorithms to help judges assess risks of non-appearance, as well as techniques of defendant monitoring that can include periodic phone calls, electronic anklets, and so forth."
Cato Institute
May 10, 2018