SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 863

Turning now to the overall amortization period for primary
income, here this period, given the assumptions made, is
equal to

334-32)

& -(; ; 8 axon’ A

LYR-1(s

3 ÎT | -

¥

whence

(334-33)

For

O=4.23,

A=0.316, (!) we find

®=4.05.

[his value is of the same order of magnitude as the values ©
® and 6, 4.56 and 4.23 respectively, found earlier (-,

11) Of course, the concordance of the orders of magnitude
 of the different values of the quantities studied in the
preceding calculations cannot be considered as proof of the
validit~ "te exponential model. The successive hypotheses

(1

5 and

374-7

11] Allais - pag. 167