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