Dear Doug,  
  
on Lautenbach I suggest to read as a starter  
  
Juergen Backhaus, 'Keynesianism in Germany', in  
Tony Lawson, Hashem Pesaran (eds.), Keynes' Economics.Methodological Issu=  
es,  
London/New York 1985: Routledge, pp.209-253.  
  
The article contains a long list of references for further reading.  
  
Harald Hagemann