Economics and Euclidean geometry I am looking for economics papers which use concepts, techniques and theorems from geometry. I am mainly interested in Euclidean geometry, the kind of material that is taught on high-schools (e.g. proving theorems about triangles, squares, circles, etc.). But, other kinds of geometry are also interesting.

I looked at some papers about land economics, thinking that it geometry can be useful there (after all, the word "geometry" means "measurement of land"). But, the papers I found used mostly advanced measure theory and topology. I am looking for more basic geometric methods.
UPDATE 19-9-2017

I just received word from the author that the book is now freely downloadable in English, at this link.



Got it. I remember browsing the pages of this book. But it was in Greek, and it does not appear to have been published also in English:

Euclidean Economics: A Mathematical Method for Construction and Application of Economics Models


  "The book establishes that economics can be studied and utilised on
  the basis of a minimum of fundamental hypotheses and the general laws
  of mathematics. Starting from 12 major propositions, it proves that
  closed exchange networks are replicated by systems of 2n first-order
  non-homogeneous linear differential equations, which simulate
  household, business, bank and government receipts and payments. Such
  networks are defined in the (R2n, t) vector space, where n is the
  number of sectors or markets and countries or currencies, while t is
  the elapsed time. Uniqueness, stability and controllability of the
  steady state as well as takings and outgoings are functions of
  behaviour coefficients and policy parameters. Annual sales of
  services, products and securities divided by average salaries, prices
  and values yield the man hours, output items and liquidity units
  traded. Demanded quantities do not coincide with available quantities.
  Potential inflation or deflation is proportional to the weighted
  deficit or surplus of market goods. Digital animation of the
  endogenous variables is possible on the basis of historical, projected
  or hypothetical data about the exogenous variables."


Author: Sophocles Michaelides
Language: Greek
Publisher: Mesogios Publications – Ellinika Grammata
ISBN: 9963-9176-0-7
Year: 2006

The summary does not state it clearly, but the "12 major propositions" are Euclidean, as I recall.