Swift answer to my blog prayers seeking information on faith-based prisons

Yesterday I asked this post "What is the current status and latest research on faith-based prisons?". Today, thanks to Professor Sasha Volokh my blog prayers have been answer via this article available now on SSRN titled "Everything We Know About Faith-Based Prisons."  Here is the headline of today's must read:

This Article examines everything we know about the effectiveness of faith-based prisons, which is not very much.

Most studies can’t be taken seriously, because they’re tainted by the “self-selection problem.”  It’s hard to determine the effect of faith-based prison programs, because they’re voluntary, and volunteers are more likely to be motivated to change and are therefore already less likely to commit infractions or be re-arrested.  This problem is the same one that education researchers have struggled with in determining whether private schools are better than public schools.

The only credible studies done so far compare participants with non-participants who volunteered for the program but were rejected.  Some studies in this category find no effect, but some do find a modest effect.  But even those that find an effect are subject to additional critiques: for instance, participants may have benefited from being exposed to treatment resources that non-participants were denied.

Thus, based on current research, there’s no strong reason to believe that faith-based prisons work.  However, there’s also no strong reason to believe that they don’t work.  I conclude with thoughts on how faith-based prison programs might be improved, and offer a strategy that would allow such experimentation to proceed consistent with the Constitution.