Classical microeconomics is intended to explain how a price system is
able to coordinate the economic agents. But even if it can be extended
to incomplete information and externalities, it remains grounded on very
heroic assumptions. Agents are endowed with a very strong rationality,
equilibrium is stated without a concrete process to achieve it, market
is the unique institution considered. Evolutionary microeconomics is
aimed at bypassing these limitations by considering a dynamic approach,
however not biologically oriented. Agents have local information and
bounded rationality, they are involved in explicit processes of
interactions through time, various institutions sustain the market or
substitute to it. It explains then some phenomena hardly explained by
classical microeconomics: dispersion of prices, variety of industrial
structures, financial bubbles.