SEMAINE D'ÉTUDE SUR LE ROLE DE L ANALYSE ECONOMETRIOUE ETC. 
Le 
matrices : 
so that we can identi? 
I+A) = 1- 
oy 
r. 
A 
This implies 2pA =1. When added to and subtracted from the 
equation for p(1+ Xx?) we obtain expressions for p(x +1)? and 
p(x — 12: 
pI+4)? — 2 | 
r) 
4) 
pa - 22 
Taking the ratio and then square roots leads to a linear equa- 
“on in À with the following solution: 
‘A 
{be + @ 
she + q 
f 
* 
and the solution for p is then 1 
with (A.6) we conclude: 
—, 
On combining these results 
A.5, 
Dheil - pag.