LA 
PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARTA - 28 
Appearence oF 
the primary input 
In consumption 
es 
rot 
Input: Ry(t+1- 8) ¢ (¢+1-6,6) db 
=Ro(t+1) © (£+1, 6) de . 
FiG. 3 
The value at instant t of the primary input furnished prior 
to ¢ appearing in consumed income Ro(¢+ 1) dt of the period 
(+x, t+T+dT) is 
So 
a [ Ro (#+T-0) 0. (t+-1-0,0)e t+ eae 
Thus from (111-7) 
(113-5) Clt)=R,, (1) a 
re 
£ 
- “than (i-p)du 
P(t+T-0,0)e T° Ja 
MN 
11] Allais - pag. 26