tâtonnement process

E588136

The tâtonnement process is an economic adjustment mechanism, introduced by Léon Walras, in which prices are iteratively revised in response to excess demand or supply until a general equilibrium is reached without actual trades occurring out of equilibrium.

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Label Occurrences
tâtonnement process canonical 1

Statements (46)

Predicate Object
instanceOf economic adjustment mechanism
general equilibrium concept
price adjustment process
appliesTo exchange economies
multi-market economies
production economies
assumes centralized price setting by an auctioneer
assumption agents take prices as given
markets are cleared only at equilibrium prices
no trades occur out of equilibrium
characteristic discrete or continuous price adjustments
dynamic adjustment path toward equilibrium
no quantity trading during adjustment
conditionForConvergence gross substitutability of excess demand functions
stability of excess demand functions
contrastedWith non-tâtonnement adjustment processes
quantity adjustment mechanisms
coreIdea prices are iteratively revised in response to excess demand or supply
criticizedFor ignoring quantity rationing during adjustment
lack of realism about no trade out of equilibrium
potential instability or cycles in some economies
equilibriumCondition market demand equals market supply in all markets
etymology from French "tâtonner" meaning "to grope" or "to grope one’s way"
field general equilibrium theory
microeconomics
goal reach general equilibrium
historicalContext developed in late 19th century
idealizationOf how competitive markets might adjust toward equilibrium
influenced modern dynamic general equilibrium models
influencedBy Léon Walras’s Elements of Pure Economics NERFINISHED
introducedBy Léon Walras NERFINISHED
involves calculation of excess demand in each market
iterative price revision until excess demand is zero
languageOfOrigin French
mathematicalFormulation difference equations for iterative price updates
differential equations for price dynamics
mechanism auctioneer adjusts prices based on excess demand
relatedConcept Walrasian auctioneer NERFINISHED
Walrasian equilibrium NERFINISHED
general competitive equilibrium
relatedResult Arrow–Hurwicz stability analysis NERFINISHED
Sonnenschein–Mantel–Debreu results on excess demand
requiresInformation knowledge of aggregate excess demand in each period
teaches conceptual separation between trading and price formation
usedIn stability analysis of general equilibrium
theoretical analysis of market stability

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Input
Subject: tâtonnement process
Description of subject: The tâtonnement process is an economic adjustment mechanism, introduced by Léon Walras, in which prices are iteratively revised in response to excess demand or supply until a general equilibrium is reached without actual trades occurring out of equilibrium.

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Leon Walras knownFor tâtonnement process
subject surface form: Léon Walras