378 
PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
All the statistical data analysed lead to the conclusion that 
in present conditions ®_ is of the order of marnitude 
@ = 
the time unit used being the year, and we have probably (4 
38< O< 1.6. 
The increase in real consumable income Rg which can be 
had by moving from a value © to the value ®, corresponding 
to the maximum value of Re is equal to 
(410-3) 
KR 
= wo ee 8 
g R° 
or, from relation (410-1) 
(410-4) 
2 
0 
© eo 
-—e 
® 
In each situation, the value of the difference 7 - ¢ is given 
by the relation (251-5) 
410-3, 
1-6 rz 5 
€ 
(1) This question cannot be taken up -here. 
11 Allais - pag. 187