790 
PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
Then, in order to calculate real national income R, it is 
quite natural to make, at least as a first approximation, the 
assumption that 
(229-2) 
R-[X ‘R 
R | Re 
C 
which, when k=1, gives 
(229-3) 
R R, 
ER 
This expression can be considered as valid at least as a first 
approximation. 
It is then possible to deduce from (124-3) and (229-2) 
220-4) 
R k 
= | R, 
R= 0 
Whence, bringing in relations (224-2) and (228-12), we 
derive 
(229-5) 
R(t) -| i-p ¢ (i-p) ,~% (ime)! 
Rolf) (3-p)b(i-p) 
11] Allais - pag. 04