In his 1989 Cambridge doctoral dissertation,The Concept of Equilibrium in Neoclassical Theory, Franco Donzelli observed that, "The history of the neoclassical approach over the last one hundred and twenty years can be interpreted as a history of the relationship between instantaneous and stationary equilibrium models, on the one hand, and of the developments internal to either class of models, on the other" (Donzelli 1989, p. 31).
This book addresses the gaps in undergraduate teaching of partial equilibrium analysis, providing a general equilibrium viewpoint to illustrate the assumptions underlying partial equilibrium welfare analysis. It remains unexplained, at least at the level of general economics teaching, in what sense partial equilibrium analysis is indeed a part of general equilibrium analysis. Partial equilibrium welfare analysis isolates a market for a single commodity from the rest of the economy, presuming that other things remain equal, and measures gains and losses by means of consumer surplus. This is a money metric that is supposed to be summable across individuals, recommending policy that maximizes the social surplus. But what justifies such apparently uni-dimensional practise? Within a general equilibrium framework, the assumption of no income effect is presented as the key condition, and substantive general equilibrium situations in which the condition emerges are presented. The analysis is extended to the case of uncertainty, in which the practice adopts aggregate expected consumer surplus, and scrutinizes when such practice is justified. Finally, the book illustrates partial equilibrium as an institutional artifact, meaning that institutional constraint induces individuals to behave as if they are in partial equilibrium. This volume forms an important contribution to the literature by researching why this disparity persists and the implications for economics education.
ABSTRACT This article aims to distinguish different uses of the notion of equilibrium in various theoretical economic approaches and to establish a classification in the myriad of interpretations of equilibrium. It does so by categorizing equilibrium in two dimensions: (i) semantical, which deals with the meaning of the notion of equilibrium in different theoretical contexts; and (ii) methodological, that sees equilibrium as an analytical tool - that is, a method for apprehending certain aspects of the economic system. We argue that the diversity of equilibrium uses hampers the debate among different theoretical perspectives, making it harder to assess how fruitful this notion can be to the comprehension of economic phenomena.
Professor Kenneth J. Arrow is one of the most distinguished economic theorists. He has played a major role in shaping the subject and is honoured by the publication of three volumes of essays on economic theory. Each volume deals with a different area of economic theory. The books include contributions by some of the best economic theorists from the United Stated, Japan, Israel and Europe. This second volume is entitled Equilibrium Analysis and is divided into sections on general equilibrium and on the microfoundations of macroeconomics
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