SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 
Again, wr 
hav 
(512-14) 
As the first term 1s positive and the second is necessa 
greater than - w~ again find the general condition 
(312-15) 
The Order o} mMagnituc 
513. It may be remarked that in general, and :* ti. € 
ference (i -g¢) is sufficiently small, if vc is given (this 
equivalent, as a first approximation, to the ©, being given (,. 
It follows that the order of magnitude of T is determined, as a 
first approximation ™ "he relation 
f - 
515 _ 
Consequently the less ranid the decline of the coefficients w,_;, 
the lower the value of T, and the more rapid the convergence 
of the series expansions (5I. _ 
() From the BUNJAKOWSKY-SCHWARZ Inequality (BRONsS- 
DJAJEW, Taschenbuch der Mathematik, p. 135). 
This inequality, moreover, follows irnmediately from 
given in $ 517 below (relation 517-2). 
(?) Main text, condition (220-13). 
(3) Which, it mav again be recalled, is equivalent 
(relation 226-2). 
( We have according to relation (za 
2 vy s@ - 
1c 
5) 
Relation 
51 
2- 
SEMEN 
-nternretation 
veing given 
11} Allais - pag. 21