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The Fundamental Theorems of Welfare Economics, DSGE and the Theory of Policy - Computable & Constructive Foundations


  • K. Vela Velupillai


The genesis and the path towards what has come to be called the DSGE model is traced, from its origins in the Arrow-Debreu General Equilibrium model (ADGE), via Scarf's Computable General Equilibrium model (CGE) and its applied version as Applied Computable General Equilibrium model (ACGE), to its ostensible dynamization as a Recursive Competitive Equilibrium (RCE). It is shown that these transformations of the ADGE - including the fountainhead - are computably and constructively untenable. The policy implications of these (negative) results, via the Fundamental Theorems of Welfare Economics in particular, and against the backdrop of the mathematical theory of economic policy in general, are also discussed (again from computable and constructive points of view). Suggestions for going 'beyond DSGE' are, then, outlined on the basis of a framework that is underpinned - from the outset - by computability and constructivity considerations

Suggested Citation

  • K. Vela Velupillai, 2011. "The Fundamental Theorems of Welfare Economics, DSGE and the Theory of Policy - Computable & Constructive Foundations," ASSRU Discussion Papers 1125, ASSRU - Algorithmic Social Science Research Unit.
  • Handle: RePEc:trn:utwpas:1125

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    References listed on IDEAS

    1. K. Vela Velupillai, 2008. "Uncomputability and Undecidability in Economic Theory," Department of Economics Working Papers 0806, Department of Economics, University of Trento, Italia.
    2. Gilboa, Itzhak, 2012. "Rational Choice," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262518058, July.
    3. Takashi Negishi, 2008. "Unnoticed predecessors of the early Negishi theorems," International Journal of Economic Theory, The International Society for Economic Theory, vol. 4(2), pages 167-173.
    4. K. (Vela) Velupillai, "undated". "Computability and Complexity in Games," Working Papers _010, University of California at Los Angeles, Center for Computable Economics.
    5. K. Vela Velupillai, 2011. "Freedom, Anarchy and Conformism in Academic Research," ASSRU Discussion Papers 1123, ASSRU - Algorithmic Social Science Research Unit.
    6. K. Vela Velupillai, 2011. "Towards An Algorithmic Revolution In Economic Theory," Journal of Economic Surveys, Wiley Blackwell, vol. 25(3), pages 401-430, July.
    7. Scarf, Herbert E., 1993. "The computation of equilibrium prices: An exposition," Handbook of Mathematical Economics,in: K. J. Arrow & M.D. Intriligator (ed.), Handbook of Mathematical Economics, edition 4, volume 2, chapter 21, pages 1007-1061 Elsevier.
    8. Shoven,John B. & Whalley,John, 1992. "Applying General Equilibrium," Cambridge Books, Cambridge University Press, number 9780521266550, March.
    9. Takashi Negishi, 1961. "Monopolistic Competition and General Equilibrium," Review of Economic Studies, Oxford University Press, vol. 28(3), pages 196-201.
    10. K. Vela Velupillai, 2005. "The Foundations of Computable General EquilibriumTheory," Working Papers 0093, National University of Ireland Galway, Department of Economics, revised 2005.
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    More about this item


    Computable General Equilibrium; Dynamic Stochastic General Equilibrium; Computability; Constructivity; Fundamental Theorems of Welfare Economics; Theory of Policy; Coupled Nonlinear Dynamic;

    JEL classification:

    • C02 - Mathematical and Quantitative Methods - - General - - - Mathematical Economics
    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models
    • D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
    • E61 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Policy Objectives; Policy Designs and Consistency; Policy Coordination

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