SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 
493 
Our second task, according to (A.3, is to postmultiply this 
‘nverse bv tle <r! 
“A. IV} NS 
Then, after postmultiplying the inverse by this vector we obtain 
the optimal decision ver!ur - " of which the #" component is: 
AI 
which is eauivale..t 
5° 
sui the first component 
Theil - pag. 2c