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# Topic: Comparative statics

###### In the News (Thu 23 May 13)

 Comparative statics - Wikipedia, the free encyclopedia Comparative statics is the comparison of two different equilibrium states, before and after a change in one of the variables. The term 'comparative statics' itself is more commonly used in relation to microeconomics (including general equilibrium analysis) than to macroeconomics. For models of stable equilibrium rates of change, such as the neoclassical growth model, 'comparative dynamics' is the counterpart of comparative statics, but the term has less currency (Eatwell, 1987). en.wikipedia.org /wiki/Comparative_statics   (247 words)

 Describing CS Wiz For example, an individual demand curve is derived from a comparative statics exercise on the consumer's optimization problem (maximization of utility subject to a budget constraint). To analyze the comparative statics properties of the model, the numerical value of a single exogenous variable can be changed and the problem resolved. Comparative statics analysis is completed by simply comparing the initial and new values of the endogenous variable. www.wabash.edu /econexcel/compstatics/Description/home.htm   (1103 words)

 Comparative Statics Analysis in Economics Comparative Statics is the determination of the changes in the endogenous variables of a model that that will reusult from a change in the exogenous variables or parameters of that model. A comparative statics analysis tells how the monopoly price would be affected by changes in the exogenous variables N and y and in the parameters F and c. Thus in many cases comparative statics results can be established with the combined use of the first order and second order conditions. www.sjsu.edu /faculty/watkins/compstat.htm   (1987 words)

 Comparative Statics in the G&S Model omparative statics refers to any exercise in which one of the exogenous variables is changed and the effect of that change on the equilibrium value of the endogenous variable is shown. It is useful to think of a comparative statics exercise as a controlled economic experiment. However, by creating mathematical economic systems, (i.e., an economic model), it becomes possible to conduct similar types of "experiments." A comparative statics exercise allows one to isolate how a change in one exogenous variable affects the value of the equilibrium variable while controlling for changes in other variables that might also affect the outcome. internationalecon.com /v1.0/Finance/ch50/F50-9.html   (221 words)

 MAT 200 Lecture Notes -- Comparative Statics Comparative statics is the art-or science?-of determining how an equilibrium, often the solution of an optimization problem, depends on exogenous conditions. It is not the job of comparative statics to tell you what will happen in a system at equilibrium if the exogenous conditions are actually changed. Comparative statics only makes comparisons between two different systems at equilibrium, identical except for the exogenous conditions they satisfy. www.math.princeton.edu /~stalker/200f99/notes_12.html   (1046 words)

 SSRN-The Comparative Statics of Collusion Models by Kai-Uwe Kuhn, Michael Rimler   (Site not responding. Last check: 2007-11-02) We develop and illustrate a methodology for obtaining robust comparative statics results for collusion models in markets with differentiated goods by analyzing the homogeneous goods limit of these models. This analysis reveals that the impact of parameter changes on the incentives to deviate from collusion and the punishment profits are often of different order of magnitude yielding comparative statics results that are robust to the functional form of the demand system. We use this methodology to demonstrate the non-robustness of Nash reversion equilibria and to develop new results in the comparative statics of collusion. papers.ssrn.com /sol3/papers.cfm?abstract_id=926106   (417 words)

 SSRN-Monotone Comparative Statics: A Geometric Approach by Bruno Strulovici, Thomas Weber   (Site not responding. Last check: 2007-11-02) A geometric method is developed for finding a vector field that, at each point in the parameter space, indicates a direction in which monotone comparative statics obtain. Given such a vector field, we provide sufficient conditions under which the problem can be reparameterized on the parameter space (or a subset thereof) in a way that guarantees monotone comparative statics. Strulovici, Bruno H. and Weber, Thomas A., "Monotone Comparative Statics: A Geometric Approach" (October 2004). papers.ssrn.com /sol3/papers.cfm?abstract_id=604862   (302 words)

 [No title]   (Site not responding. Last check: 2007-11-02) Comparative Statics: An analysis of changes in equilibrium prices and quantities if either or both supply and demand shift. In terms of class discussion, comparative statics referred to determining the changes in the endogenous variables (i.e. There are many examples and illustrations of doing comparative statics in Chapter 4. econ.bu.edu /faculty/cooper/EC102/quizzews/quiz2f00.htm   (249 words)

 Hale, D., Lady, G., Maybee, J., et al.: Nonparametric Comparative Statics and Stability. The authors, leading researchers in the fields of mathematical economics and methodology, present the first comprehensive synthesis of literature on qualitative and other nonparametric techniques, which are important elements of comparative statics and stability analysis in economic theory. The topics covered show how to assess the comparative statics and stability of economic models without a precise quantitative knowledge of all model components. Constituting a virtually self-contained manual on such analysis, it provides detailed derivation of necessary and sufficient conditions for the existence of restrictive comparative statics and stability results for a range of specified models. press.princeton.edu /titles/6762.html   (332 words)

 EconPapers: Comparative Statics by Adaptative Dynamics and the Correspondence Principle Comparative Statics by Adaptative Dynamics and the Correspondence Principle Abstract: This paper formalizes the relation between comparative statics and the out-of-equilibrium explanation for how a system evolves after a change in parameters. Moreover, under some conditions monotone comparative statics and stability are equivalent. econpapers.repec.org /paper/udewpaper/2099.htm   (244 words)

 EconPapers: Comparative Statics with Never Increasing Correspondences It is shown that the equilibrium set in such models is a non-empty, complete lattice, if, and only if, there is a unique equilibrium. For a given parameter value, a pair of distinct equilibria are never comparable. Moreover, generalizing an existing result, it is shown that when a parameter increases, no new equilibrium is smaller than any old equilibrium. econpapers.repec.org /paper/wpawuwpga/0505001.htm   (260 words)

 Notes on Section 15.4 Section 15.4: Comparative Statics Using the Implicit Function Theorem I assigned Section 15.4 because I think it's a good idea for us to see an economic application of the implicit function theorem. Now that we understand the model, the whole point of the application is to show how the Implicit Function Theorem can be useful to help us do comparative statics. www.u.arizona.edu /~dreiley/econ519/ComparativeStatics.html   (504 words)

 Uniqueness, Stability, and Comparative Statics in Rationalizable Walrasian Markets ewp-ge/9802003   (Site not responding. Last check: 2007-11-02) Moreover, the equilibrium correspondence is locally monotone in a neighborhood of each observed equilibrium in these economies. Thus the hypotheses that equilibria are locally stable under tatonnement, equilibrium prices are locally unique and equilibrium comparative statics are locally monotone are not refutable with a finite data set. Access statistics for this paper at LogEc which is a part of the RePEc project as was/is EconWPA. econwpa.wustl.edu /eprints/ge/papers/9802/9802003.abs   (477 words)

 EconPapers: Ratio Orderings and Comparative Statics Abstract: Monotone ratio orderings are refinements of first order stochastic dominance that allow monotone comparative statics results in games of incomplete information. We develop analogous refinements for second order stochastic dominance based on the monotonicity of the cumulative probability ratio and the unimodality of the likelihood and probability ratios. We go on to investigate comparative statics in first price auctions, both private and common value, of the effects of more precise information in the sense of the new orderings. econpapers.repec.org /paper/ednesedps/91.htm   (256 words)

 Comparative Statics of von Thünen's Model of Land Use   (Site not responding. Last check: 2007-11-02) Comparative Statics of von Thünen's Model of Land Use Von Thünen model of land use shows how market processes could determine how land use in different locations. A decrease in transportation costs would tend to swing the rent line up but as the price of the product in the market decreases the rent schedule would shift downward. www.sjsu.edu /faculty/watkins/thunen1.htm   (538 words)

 CiteULike: Comparative Statics and Perfect Foresight in Infinite Horizon Economies   (Site not responding. Last check: 2007-11-02) CiteULike: Comparative Statics and Perfect Foresight in Infinite Horizon Economies Comparative Statics and Perfect Foresight in Infinite Horizon Economies Note: You or your institution must have access rights to this article. www.citeulike.org /user/toomash/article/93159   (288 words)

 Comparative Statics Calculations -- from Mathematica Information Center Comparative Statics Calculations -- from Mathematica Information Center This Notebook describes how to use Mathematica to do comparative statics calculations. Economics, Statics, Comparative Statics, Optimization, Profits, Hessian, Maximization, Constrained Maximization, CompStat.ma library.wolfram.com /infocenter/MathSource/4584   (49 words)

 Monotone Comparative Statics For technical questions regarding this item, or to correct its listing, contact: (Christopher F. Baum). "Monotone Comparative Statics," Papers 11, Stanford - Institute for Thoretical Economics. Cited by (explanations, Please report citation or reference errors to): ideas.repec.org /a/ecm/emetrp/v62y1994i1p157-80.html   (240 words)

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