I need a list and summary of leading theories of the business cycle. 
Beginning with Keynesian and Real Business Cycle theories, I need to
know of any other leading theories that differ from these two
substantially (i.e. not merely an extension or similar version of
these).  I am also interested in theories of unemployment, and how
they fit into the theories of the business cycle.  Please include
references to major research on these theories.  Also, I would like to
know of empirical research that has tested the validity of these
theories.  Please request clarification if necessary.
Thanks!

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Request for Question Clarification by omnivorous-ga on 08 May 2004 15:49 PDT

MGW36 --

There are DOZENS of theories of the business cycle.  Here, for
example, is one of the more obscure ones that has die-hard advocates:
Kondratiev Wave
http://www.gold-eagle.com/editorials_01/alexander051401.html

Asking for a specific number and/or those cited most often is academic
research is most-likely to get you a good result here.

Best regards,

Omnivorous-GA

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Clarification of Question by mgw36-ga on 08 May 2004 16:07 PDT

I am looking ofr leading theories.  I realize there must be many
obscure theories and assertions based on trends in the data.  I am not
looking of a list of dozens of these, rather I need a them to be
firmly rooted in economic theory and cited in credible, academic
research.  I hesitate to specify a number, because I dont really know
if there are many that differ substantially from the basic Keynesian
or Real theories.
thanks Omnivorous