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monoticity of this relationship; and most empirical investigation 
would bear out this hypothesis. Again, I want to emphasize the 
highly exploratory character of my paper, which represents only 
an initial attempt to dig away at a problem which constantly plagues 
every regional-national planner — and a problem which has been 
by and large ignored by social scientists in their analytic frame- 
works 
A & 
Isard - pag. 35