SEMAINE D'ÉTUDE SUR LE ROLE DE L ANALYSE ECONOMETRIQUE ETC. 
719 
The characteristic curve of primary income appearing at 
me / is shown in Fieurc 
ple, 6 
2r18tic curv 
roduchon 
1. 
This curve is obviously asymptotic to the 6 axis, for first 
there exists no consumable object to day which does not con- 
cain some input dating back as far as Julius Caesar ('), end 
second it is clear that the influence of primary inputs tends tc 
zero when the distance in time increases indefinitely. 
The characteristic curve for amortisation of primary income 
furnished at time # but appearing in consumed income at some 
future moment is given in Figure (2). 
haracleristic curve 
Cr amortizatson 
(}) Indeed, certain investments made by the Romans are still yielding 
‘evenue. À good example is the Coliseum at Rome. 
11] Allais - pag. 23