SEMAINE D ETUDE SUR LE ROLE DE L'ANALYSE ECONOMETRIQUE ETC. 
can be obtained by putting i=o0 in the expressions for 
breakdown of capital i.e. by putting 
(334-17) 
4 
Bac 
- 
_L1€- 
in the three relations (334-13) to (334-15). 
Finally, the average amortisation periods for the three 
sroups considered are 
334-18) 
1 
:(e)de ‘ 
= 
334-19) 
«AV 
334-20) 
The last o: tiese c:xpressions is particularly simple. 
aally 
334-21) 
‘7.1 Allais - pag. 1