720 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28

The functions © (t, 0) and 9 (t, 0) define the capitalistic
structure of the economy.

Average production and amortization periods

112. Taking into account the relations (111-3) and (111-4),
an average amortization period ® and an average production
period ® can be defined by the following formulae:

(112-1)

(112-2)

9() = [ 7 Dep(2, 6) d 9

o() = [ b(2,0) d0

Income and Capital

I13. From the definitions which have been given above, consumed
 national income (total consumption) at factor cost is
ojven as

(113-1)

LL,

a.
od 0

I
[

() If the global production function with respect to primary inputs is
homogeneous of order k and if pricing is nronortional to marginal cost

[11] Allais - pag. 24