SEMAINE D'ÉTUDE SUR LE ROLE DE L'ANALYSE ECONOMETRIQUE ETC. 
SJPENDIX 
THE INFUENCE ON THE RESULTS OF A VARIATION 
OF THE FUNCTION Ç(6) 
It is very interesting to study what happens to the various 
results when the function (8) is no longer of exponential form, 
the aim being to see to what extent they are modified when 
that function changes. 
I will study first the general case in which, j being constant, 
3(0)e*’ can be expanded as a Taylor series and second two 
particular cases for which the calculations can be carried all 
the way through. 
It may perhaps be thought that the calculations of this 
appendix are no more than an intellectual game. Yet they 
are very important in the sense that they allow the demonstra- 
tion of the fact that under very general hypotheses, th- +ara- 
meter À (!) does not differ very greatly from unity whence 
it follows that the properties of the general model remain vzrv 
similar to those of the exponential model 
Relations (220-6), (220-14), (25i- 
,) allu 
anc 
Allais - pag. 205