Jan
Tinbergen

Erasmus University


Hendrik Antonie
Kramers

Leiden (Physics Tree)






Emil
Lederer

Heidelberg University


Alfred
Weber

Heidelberg University


Jacob
Marschak

Oxford Institute of Statistics & New School for Social Research




Herschel I.
Grossman

Brown (PoliSci Tree)

John M.
Barron

Purdue
(Options)

John BarronX