SEMAINE D'ÉTUDE SUR LE ROLE DE L ANALYSE ECONOMETRIOUE ETC. 1033 
so on. From the viewpoint of a complete programming problem 
I think we must look first into what I have called the Problem of 
Patterns of Centres, We may find a certain pattern of centres, 
which is entirely different from the traditional administrative lines 
of demarcation. It must be based on an entirely different complex 
of relations that goes deeper down into the basic problems of eco- 
nomic relations, transportations and so on. This problem of the 
pattern of centres may be approached somewhat in the same way as 
the construction of investment projects. In a complete development 
and investment programming work, there are two stages. In the 
first place, you must have a large list of investment projects to 
choose from. The list must be as diversified as possible, each 
project in the list being characterised by objective data of various 
sorts: What the increase in capacity will be if and when we have 
carried through the investments, what in put effects will be ma- 
nifest if and when you decide to go through with a specific group 
of projects and so forth. I have said connection about this in my 
paper. The essential point to retain in this comment is that when 
you make this list of projects you must not think that the mere 
entering of a project in the list is equivalent to saying « I am going 
to carry this project out ». It is simply putting up an alternative 
that may or may not be accepted and it is from this big list of 
investments projects that we have to choose: the list is the basis of 
the scientific programming of decisions on investments. Similarly 
we should handle a list of Patterns of Centres 
ATT AIS 
I do not see at all what procedure professor FRISCH rer -r.mend._ 
If we have to choose investments or to decide what “> us 
be followed for different regions, the problems to be solved are 
absolutely different. A planning bureau can choose between dif- 
ferent investment projects according to different criteria - - that is 
very simple and clear in principle, but if we have to decide what 
policy to apply for different regions, the nature of the problem is 
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Isard - pag. 31