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industrial structure at a particular point of time, the vertically 
integrated coefficients can be split and analysed into inter 
industry coefficients particular to that point of time. 
In this way the static input-output and the dynamic ver- 
tically-integrated systems appear as mutually complementary 
and completing each other. Inter-industry relations, referring 
to any particular point of time, represent a cross-section of 
the vertically integrated variables, whose movements through 
ime express the structural dynamics of the economic system. 
10] Pasinetti - pag. 107