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PHOF. DR J. TINBERGEN

THE HAGUE, 13 July 1951
Sljzenlaan h^

Dr Andrew Plkler,
110 May Avenue
Monrovia, Calif.
USA.
Dear Dr Plkler,
Thank you very much for sending me some offprints of recent articles, I must apologise for not having
answered you earlier. The difficulty was that I wanted
some time in order to give shape to my ideas concerning these
papers. Unfortunately I was so busy that I did not yet
find any time.
I may give you my provisional o'^^ nion about
working with analogies between physics and economics.
Being myself a physicist by origin and having myself tried
in my thesis to work a little bit on this subject, I have
some opportunity to consider this subject: rry feeling is
that there is a danger in working with these analogies,
since one is so easily tempted to misinterpret the economic
object desirous as one is to make the analogy as complete
as possible. The art therefore is, of course, to avoid this.
On the other hand the use of analogies
consists, of course, of solving with its help problems so
far unsolved. I am therefore particularly interested in
knowing which problems you claim to have solved on the basis
of some of the analogies you drew our attention upon.
Please, do not consider this as a criticism:
I have not really carefully studied your papers for lack
of time. It is just only to show you my interest. I shall
do my best to answer your previous letter more dèfinitelyy
within due time.
%urs very sincerely,

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