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PROF. DR J. TINBERGEN

THE HAGUE, 11 October 1950
Sijzenlaan ^•1
Mr William B. Simpson,
Managing Editor of "Econometriea"
university of Chicago,
Chicago (37) Illinois
USA

Dear Mr Simpson,
Please, find enclosed a short addition to the
second version of my article for ECONOJïETRICA. It is the
intention that it be added as a foot-note on page 17 (middle of
the page after the words:" ïhe results are").
Yours

very sincerely,

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