3 
) 
PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 2R 
The expressions for these three ratios contain only the func- 
tion ¢(i - p), so that for any country at a given moment, there 
is in fact available one and one only piece of information about 
b(w). 
Eliminating ¢(z - p) from these three expressions, we find 
(312-4) 
(312-5) 
R + 
R, 1Y 
Re - I-Ÿp 
R 
These two relations are in fact relations (123-6) and (123-7) 
which were developed in the examination of quasi-stationary 
process with a variable rate of growth of primary income, 
and they are absolutely independent of hypothesis (b) (1). 
The first has general validity since it results from (110-2) 
and (110-9) (§ 226), the second follows exclusively from the 
fact that we have simultaneously 
(312-6) 
(312-7) 
rT dC 
_ ZZ _p 
C dt 
1 dR, 
| R. ra 
1) § 211 
11] Allais - pag. 116