Prof. Horowitz: 
 
     It started from idle curiosity.  Really. 
 
     If there is a new epistemology-psychology out there, what would 
economics built on it look like?  All the various economicses are 
defensible, given their different questions and purposes.  The 
original question here was stricly academic.  People who have 
something `positive' they want to do with economics would hardly be 
interested in the question; at least, not until the economics 
suggested had been built, and they could see to what use it might be 
put.