To the Secretary of The Econometric Society
The university of Chicago
Chicago 37
Illinois U.S.A.
Dear Mr.Simpaon,
The undersit.;ned. Prof .Dr. J.Tinbergen, % e Hagu», and
Prof,W.J.de Langen,Wassenaar, are proposing as a memher of The
Sconometric Societyj
Dr.B.H.de JonghyHerengracht 519-525,Amsterdam,
Managing Director of the United 4peurance-company Hetherland Inc.,
Herengracht 519-525»Arasterdam,
Dr.De Jongh le an economist,specially dealing with the
mathematical theory of insxxrance, and a serious student interested
in the objectives of the Society,
Yours faithfully.
