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118

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Professor Ragner Frisch,
Universitetets SocialjzJi^oaowiske,
Karl Johans Gate ^ 7 , '•'^•^^'•
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icy aaar !• risen,
Thank you for yours of May 5 and 6. I an very
glaa -.:r ^viundson is interested in the point of the approxiaat'
in ny tnodel and I am looking forv/ard to his comments. In the
coming week I hope to he ahle to write down some considerations
about a comparison of your models and mine. I am also looj0M§forward to Bjérve's comments on the index^ mi^^hej^^.probLera;;!^^
point .was'finding .out in short what d b c u j ^ ^ ^ ^ i ^ ^ p M W i ^ ^ * ^
of your .w^^in.'

1^^

I had a look into your summary of the"'v7orld
Conference-' and I have in fact no remarks,except that at
morning in the bus back to Oslo we considered using acce
o'w
grave and accent aigu- for indication demand and supply as now
considered in the P.S. Have I to understand your summary this
ï/ay that after all you preferred to reserve these signs for the
objects indicated under 22 ? If so, I don't oppose. I Only do
not see why you are so m.uch, opposed against using S and D ins^- -of subr'and dem. Is it because S
_ and _
D as m-ain symbols have an
other [iiiÉfting already ? At some later time I hope to go into the
question 'ftihat Greek letters should be used for coefficients
and what for other nurooses. I think thè^e is no hurry (cf.
section 3)*
I hope you don't mind that I multiplied alreMl?
your provisional suggestions for tntérhal Information in the'
Plan Bureau and the Netherlands Economic Institute in order to
for
these; v-'e could,
have the COümP:^S:Ai9S-h^^^^^^^^^-*''i).PU\t
•^^'^'^wait
'^^f *
• ^°^
a ^ r havine the comments of
if necesS'
Koopmans, i^|^^^iah'd ''S'torïë.
Yours as ever,

(J. Tinbergen)

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