SEMAINE D'ÉTUDE SUR LE ROLE DE L’ANALYSE ECONOMETRIQUE ETC. 64. 
b) a population X, (0), which is taken as an exogenous 
magnitude. The flow of labour services which this population 
can provide in each unit of time is equal to X,(¢) divided by 
two coefficients — a(¢) and 3(¢) — standing for the proportion 
of active to total population and the proportion of actual work- 
ing time to the total time composing the time unit respectively. 
The subscript ¢ has been added to both coefficients because they 
may be undergoing a long-run trend; 
c) a series of 2(n - I) technical coefficients: 
2,(0), «.. ay, 1(0), ... ay (0), ... a, 
(0) 
expressing the inputs of labour required in the unit of time 
in combination with the appropriate stock of capital - 
produce one physical unit of final commodity. There is also 
a series of (»n - 1) technical coefficients T,, ..., T,_;, which can 
roughly be interpreted as expressing the average life-time of 
capital goods in each sector where capital goods are required; 
d) a series of (n - I) demand coefficients (-): 
a,,(0), ... a,_; qv. 
expressing per-capita demand for each consumption good in 
the unit of time. There is moreover another series of (n 
demand coefficients for new investments: 
ul, 
ee A+ 
“po 
(') It may perhaps be useful to point out explicitly that although the 
technical coefficients and the per-capita demand coefficients occupy a sym- 
metrical place in the system, they are not of the same nature. Technical 
coefficients represent sectoral concepts. Each of them is given by the 
state of technology in each particular sector. Per-capita demand coeffi- 
cients represent macro-economic concepts. Each of them is an average 
taken all over the svstem 
10] Pasinetti - pag. 
71