SEMAINE D'ÉTUDE SUR LE ROLE DE L ANALYSE ECONOMETRIQUE ETC.

oc.

The Sign of the w_

The w,_, may be positive or negative. However, to simplify
 the exposition, the following discussion will be limited tc
the case in which they are positive. It will be seen, however,
that the majority of the results which will be derived, in particular
 those concerning the order of magnitude of the parameters
 T, ©, and 4, hold in the general case where some
coefficient have a negative value.

Expression for :.

SU 4

511. In the same w--(SII-T)



vy

=

we have from _ _.

T1]

vo

1] — 1

whoa

-

WT

AY

with

511-2)

Ge

Finally, from the general formula

\

+

we have

(511-3,

Allais - pag. 200