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\newblock Stability in competition.
\newblock {\em Economic Journal}, 39(41):57, 1929.

\bibitem{Kiyotaki:Wright:money}
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\newblock On money as a medium of exchange.
\newblock {\em Journal of Political Economy}, 97(927):934, 1989.

\bibitem{Bak:etc:money}
P.~Bak, S.F. N\/orrelykke, and M.~Shubik.
\newblock Dynamics of money.
\newblock {\em Physical Review E}, 60(3):2528--2532, 1999.

\bibitem{Sneppen:money}
R.~Donangelo and K.~Sneppen.
\newblock Self-organization of value and demand.
\newblock cond-mat preprint 9906298, arXiv.org, 1999.

\bibitem{Cournot:book}
A.A. Cournot.
\newblock {\em Researches into the Mathematical Principles of the Theory of
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\newblock Macmillan, New York, 1897.

\bibitem{Bertrand}
J.~Bertrand.
\newblock Theorie mathematique de la richesse sociale (review).
\newblock {\em Journal des Savants (Paris)}, 68(499):508, 1883.

\bibitem{Chamberlin:book}
E.H. Chamberlin.
\newblock {\em Theory of monopolistic competition}.
\newblock Harvard University Press, Cambridge, MA, 1933.

\bibitem{Hehenkamp:etc:note}
B.~Hehenkamp and W.~Leininger.
\newblock A note on evolutionary stability of {B}ertrand equilibrium.
\newblock {\em Journal of Evolutionary Economics}, 9:367--371, 1999.

\bibitem{Hehenkamp:sluggish}
B.~Hehenkamp.
\newblock Sluggish consumers: {A}n evolutionary solution to the {B}ertrand
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\newblock Technical Report 99-04, Microeconomics, University of Dortmund,
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\bibitem{Brenner:prices}
Th. Brenner.
\newblock The dynamics of prices -- {C}omparing behavioural learning and
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\newblock Papers on Economics and Evolution 0001, Max-Planck-Inst. for Economic
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\bibitem{Flyvbjerg:foams}
H.~Flyvbjerg.
\newblock Model for coarsening froths and foams.
\newblock {\em Physical Review E}, 47(6):4037--4054, 1993.

\bibitem{econ:census:92}
U.S.~Census Bureau.
\newblock 1992 {C}ensus of retail trade, volume~2, subject series, part~3.
\newblock www.census.gov/prod/1/bus/retail/92subj/rc92s01.pdf.

\bibitem{Stanley:sizes:econ-letters}
M.H.R. {Stanley et al}.
\newblock Zipf plots and the size distribution of firms.
\newblock {\em Economics Letters}, 49:453--457, 1995.

\bibitem{Sneppen:etc:fractal-cracks}
G.~Huber, M.~Jensen, and K.~Sneppen.
\newblock A dimension formula for self-similar and self-affine fractals.
\newblock {\em Fractals}, 3(3):525--531, 1995.

\end{thebibliography}