Developed by Léon Walras, the General Equilibrium Model is a comprehensive mathematical representation of an entire economy, conceptualized as a network of many interconnected markets all in a state of competitive equilibrium. This approach was a significant departure from the pre-Walrasian practice of analyzing markets in isolation. To make the economy mathematically tractable, Walras's model simplifies interactions into relationships between inputs and outputs, focusing exclusively on the economy in equilibrium. This framework, which assumes all participants are price-takers, later served as the basis for proving the invisible hand theorem and the conditions under which a competitive equilibrium is Pareto efficient. A notable consequence of the model's structure is the omission of the entrepreneur's role. Following the 1917 Bolshevik Revolution, Walras's model became a key element in the debate over the feasibility of centralized economic planning, where it was unexpectedly utilized by advocates of central planning to support their positions.

Walras's General Equilibrium Model

Léon Walras, a French economist active in the nineteenth century, is noted for constructing a comprehensive mathematical model of an entire economy. This model, which has had a lasting impact on how economists analyze markets, is built on the foundational assumption that both buyers and sellers are price-takers.

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