I would like to seek answers from members on the HES mailing list to the following query.
 
There are many well known 'Schools of Economics', such as (in no particular order)
'Mercantalists', 'Monetarists', 'Marxists', 'the German Historical School', 'the Austrian
School', 'the Manchester School', 'Keynesians', 'Post-Keynesians', 'the Chicago School',
etc. Given this wide range, what are the necessary and sufficient conditions for the
definition of a 'School of Economics'?
 
I hope you can help me.  
 
Jim Thomas (LSE)