My task as editor has been greatly lightened by Millard
Hastay, who helped me verify factual details and took charge
of the preparation of the appendices. Geoffrey H. Moore also
put his knowledge at my disposal. Both Moore and Hastay
had worked very closely with Wesley Mitchell and he re-
cords in the text his indebtedness to them on special points.
It is only proper to add here that Geoffrey Moore participated
over a long period in the planning and execution of the sta-
tistical compilations of this book, and that Millard Hastay's
participation was especially extensive in the closing stages of
Mitchell's work. A committee of the Board of Directors, con-
sisting of Gottfried Haberler, C. Reinold Noyes, and George
Soule, read the manuscript with critical care. So also did
Moses Abramovitz, Daniel Creamer, and Ruth Mack of the
research staff. Of the many others who have made a contribu-
tion to this book, either by serving at one time or another as
Mitchell's assistants or aiding me at the editing stage, I wish
to mention particularly Martha Anderson, Cicely Applebaum,
Florence Cohen, Dorothy Cook, Sally Edwards, Harry
Eisenpress, Frances Goldberg, H. Irving Forman, Simon
Kuznets, Karl Laubenstein, Sophie Sakowitz, Regina S. Sands,
Julius Shiskin, Johanna Stern, and the late Denis Volkenau.

A. F. B.

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