As states look to balance burgeoning costs with public safety needs, the Urban Institute has released a timely report on the cost-benefits of expanding the availability of drug treatment among arrestees.  In To Treat or Not to Treat: Evidence on the Prospects of Expanding Treatment to Drug-Involved Offenders, the authors find that strict eligibility rules are limiting access to treatment, and they simulate several policy changes to provide guidance to policymakers on the cost-benefits of treatment expansion.  In their striking findings, "every policy change simulated in this study yields a cost-effective expansion of drug treatment. ... In particular, removing all eligibility restrictions and allowing access to treatment for all 1.47 million at risk arrestees would be most cost effective--producing more than $46 billion in benefits at a cost of $13.7 billion."