SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. "260: 
and the concavity of g(z) implied in Assumption (c) and (+0 
that 
(42) £(z) 2a 
<7 (2%) (z-2%) for all 
orn 
We shall make many comparisons of utility intezs.:  . 
feasible growth paths (x, z,) and (#}, 2), based or … ‘ an 
on either (38) or (42). To avoid repetition we stat- *  r~ 
parison here in its most general form, where - 
and © is as vet unspecified 
“ot (yar y—ul: 
et u'(ay) gz) — gle ¢) 
, — 
 F 
(43 a 
u(x) gz) —g(2 A) dt — 
t 
7 Ux 
PEN 
(43 
l<¢—&¢t ) dt _- 
u (we) a 
Lt 
4] Koobmars - pag. 30