Reading your reference quickly, what stuck out to me is whether the prisoners have already existing better relationships with family prior to incarceration, leading to more regular communication while in prison, and greater integration with family and society after release resulting in lower recidivism. Those who aren&#x27;t staying in touch may have gone into prison without ongoing family relationships, reduced connections to society, and later, increased risk of recidivism. Perhaps your link addressed that, I didn&#x27;t notice it though.<p>I think the system is screwed, don&#x27;t get me wrong, but the reference may be attributing a surface level effect (allowed to make calls) to a more latent thing (already have decent integration with family and society).