Whileevidence does suggest token economies may improveoffendersbehaviour in prison, this may have no longtermchange in the individual and as such maynotreducerecidivism when released.
This may be because the rewards of offending are nowpresentagain and the rewards of goodbehaviour have stopped.
Why it is not effective? - Copen & Flipczak (1971)
demonstratedimmediateimprovements and reduction in recidivism after two years for individualsengaging in the programme, but by threeyearsrecidivismrates were the same as national average.
Why is it not effective - unethical?
some prisons in the USA have withheldfood and drink as part of their behaviourmodification which is a humanright, not something to be earned.