Two quick suggestions (on Kant and commerce):  
  
S. Fleischacker, A Third Concept of Liberty: judgment and freedom in Kant   
and Adam Smith, Princeton: Princeton University Press (1999).  
  
---, "Values behind the Market: Kant's Response to the Wealth of   
Nations"  History of Political Thought 17:3 (1996)  379-407.  
  
Hope this helps.  
  
Best,  
  
Catherine Labio