SEMAINE D'ETUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 
C 
Le. 
(516-3) 
we have thus 
(516-4) 
A being equal to 1 for p=1 (exponential model). 
An analogous result holds of course if the w, ,, althoug 
not equal, are nevertheless of the same order of magnitude. 
b) Case in which the vw, _, do not decline rapidly 
517. It is again easy to see that if the quantities w_ _, dc 
decrease too rapidly, A is below unity or very near to i 
For, in this hypothesis and from (512-14), (1/[2Znu 
which is in any case below 1/2, will generally be small. 
As to the second term of (512-14), if the w,_,, are cons. 
idered as masses and the » as distances, it can be written 
(SI7-I, 
T 
2 
2m, OM} 
(2m, OM,” 
so that 
(517-2) 
NG Im. + Im. Gh, 
OG cs WW 
r 
> am, 
11] Allais - pag. 223