1034 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 
completely different. In fact, who will decide? The Central Plan- 
ning Bureau? But if the people of the different regions are not 
represented in this Central Planning Bureau, what will happen? I 
will give only one example. In the different Western countries, we 
have a tariff policy, and the effect of this tariff policy is that in 
these countries the peripheral regions alone support the burden of 
this policy. For instance in my own country, Brittany is bearing 
the cost of protecting the french coal mines, and in Canada, it is in 
the main the Province of Quebec which supports the Canadian 
tariff policy of Canada and so on. So, in my opinion, it is im- 
possible to treat these two problems, investment on the one hand 
and policy for each region on the other in the same wav. 
FriscH 
I am sorry that my explanation must have been too brief, be- 
cause Prof. ArLrars has completely misundertood what I meant to 
say. When I spoke about analogy with investments selection in a 
big list of projects, I was only referring to the formal construction 
of what we are going to take as a pattern of centres. There may 
be many alternative patterns of centres, or there may be many 
investment projects in our list of projects, 
I did not speak at all about how the decision of powers is to 
be distributed. We have to use this big list of alternatives of cen- 
tres, and out of those make a choice. The choice is to be studied by 
mathematical programming. 
ALLAIS 
Again there is a great difference but I do not think we can 
discuss the auestion now. 
21 Isard - pag. 32