SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE Erc. 801

KE.

— CASE OF AN EXPONENTIAL DECREASE
OF ELASTICITY j(6)

Hypothesis (d): The ratios of the elasticities of primary inputs
depends only on their distance in time

250. If the assumption is made that the ratio of the productivities
 of two inputs supplied at moments 6, and 6, (f
depends only on 6, - 6,, then considering three moments
and 0,(0,<0,<{0,) we have from (2r

250-1) B(03 - 6,) = B(03 - 05° B(9-From

 the above it follows that

(250-2)

3(0) =Ae-"®

[hen from the relations (211-3) and (220-f,

250-3)

250-4,

+] Allais - pag. 103%