THE ROLE OF CAPITAL IN ECONOMIC 
DEVELOPMENT 
MAURICE {ALLAIS 
Ecole Nationale Supérieure des Mines 
Paris - France 
« Science attempts to establish the conceptual identity of 
chings which when first perceived appeared to be different ». 
EMILE MEYERSON: Du cheminement de la bensée 
{On the Paths of Thought). 
« The truth of a theory in physics is directly related to 
the number of valid relationships which can be put on record 
by it » 
HENRI PorNcARÉ: La valeur de la science (The 
Value of Science) 
« The aim of any theory in physics is to represent experi- 
mental laws; the words truth and certainty have only one 
meaning in terms of such a theory; they express the agree- 
ment between the conclusions to be drawn from the theory 
and the relationships noted by observers ». 
PIERRE DUHEM: La théorie bhvsique (Theorv of 
Phvsics). 
.1| Allais - pag.