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Although I don't think it was widely used, Griffith Clark Evans' book- 
Mathematical Introduction to Economics- was published by McGraw-Hill in 
1930.  Evans was a professor of mathematics at Rice U. in Texas.  The book 
has exercises at the end of each chapter "with the purpose of making the 
text both available for the classroom and suitable for independent 
study"[Preface].  The mathematical content is, in some respects, 
considerably more advanced than Allen's 1938 book.  Two chapters and an 
appendix, for example, deal with problems that involve functionals and 
require claculus of variation techniques for solution. Economists cited 
include Cournot, Edgeworth, Irving Fisher and Charles Roos.  An 
interesting book. 
 
The Cowles Commission also produced a number of books in the 30's that 
might have been used as textbooks in math econ.  Charles Roos' Dynamic 
Economics (also using calculus of variations extensively) was published in 
1934.  Harold T. Davis published his- The Theory of Econometrics -in 1941. 
 Like Evans' book, Davis' book has problems at the end of every chapter.  
Despite the title, much of the book covers economic theory. There are 
chapters on the theory of monopoly and duopoly, production and alled 
functions, taxation etc.  The same author published - The Analysis of 
Economic Time Series - also in 1941.  The later book is narrowly focused 
on the subject matter indicated by the title and does not contain student 
exercises. 
 
Mike Lynch 
 
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