SEMAINE D'ÉTUDE SUR LE ROLE DE L'ANALYSE ECONOMETRIQUE ETC. 
fa. 
In the neighborhood of a given situation the fundamental 
relationship (117-19) is derived from the assumption according 
to which the relation 
110-1) 
SR, _p Ly 
Re yy 
is derived from (117-10) in the case of a dynamic process and 
applies when the use of primary factors (services rendered ™- 
labour and natural resources) over time is being studied. 
It can thus be seen that the fundamental relationship 
'117-19) of the present study results simply from the assumption 
of the existence, over a large range, of a valid index R of real 
national income at factor cost when conditions of optimum 
allocation of resources in the Paretian sense are satisfied 
Allais - pag. 5,