I would note that Timur Kuran distinguishes   
between "religious economics" and "the economics  
of religion."  The former involves trying to  
formulate a doctrine of economics that is   
consistent with a particular religious viewpoint,  
e.g. Islamic economics.  The latter supposedly  
scientifically studies the impact of religious  
conduct or affiliation on economic behavior, e.g.  
do religious believers cheat less on their taxes  
than non-religious believers?  
  
Barkley Rosser