SEMAINE D'ÉTUDE SUR LE ROLE DE L'ANALYSE ECONOMETRIQUE ETC. 04- 
and there is no longer a maximum value for 
(527-3) (ETS mz! | T( im 
T w 
6, decreases when w decreases, i.e. as the exponential mod- 
o] is approached 
Values © 
528. Although the model reduces to the exponential model 
[b=c, A=1] for w=0 (!), and to the para-exponential model 
la::01] with 
| = (m2) 
2 n 
for w=1, it would be incorrect to deduce that in all cases the 
properties of this model always lie somewhere between those 
of the exponential and para-exponential models, and in par- 
ticular that we would alwave have 
(528-1) 
For, from (526-5), however small vw, there exist values of » 
which are sufficiently large for nw greatly to exceed 1 - w. 
Jr 10r 
9 with nr 
(1a) Allais - pag. 249