SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 
YZ 
Since for arv economn 
325-2) 
.. -R, 
t follows that we have 
(325-3) 
for any economn 
In other words, testing that the ratio C/R, remains e-- 
to a constant ©, is equivalent to testing that the ratio» 
remains equal to this constant. 
This is precisely what was done above in estimating 
wal 
$ 
d) Exponential Form ot Lhe 
amortization Function 
Ae 
* 
226. 
The exponential amortization relationship 
(326-1) 
!) Relation (r1o-2’ 
2) Relation (251-3 
~ Allais - pag. 120