302 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28

whence

(250-5)

k
ae, ¢

Supplementary hypothesis (d) thus corresponds to an exponential
 decrease in the elasticities 3(0).

Characteristics of the Exponential Model

251. We have here from (220-1), (220-6) and (220-14)

¢ (u J

(251-1)

_

+0 u

J

A

Using this expression, the formulae applying to the exponenal
 model are derived directly from those already given (1).
They are presented in the table below (2).

1) Relations (223-7), (231-5), (227-3), (232-3), (224-2), (225-3), (226-1),
226-9), (226-2), (226-3), (228-12), (229-5), (233-2), (233-3), (25I-5) and
(251-6).
2) The notation Ry represents the maximum values of RB for i—o

‘117 Allais - pag. 106