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Dynamic Controllability With Overlapping Targets: Or Why Target Independence May Not Be Good For You

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  • ACOCELLA, NICOLA
  • DI BARTOLOMEO, GIOVANNI
  • HALLETT, ANDREW HUGHES

Abstract

We generalize some recent results developed in static policy games with multiple players, to a dynamic context. We find that the classical theory of economic policy, static or dynamic, can be usefully applied to a strategic context of difference games: if one player satisfies the Golden Rule, then either all other players' policies are ineffective with respect to the dynamic target variables shared with that player. Or no Nash Feedback Equilibrium can exist, unless they all share target values for those variables. We extend those results to the case in which there are also nondynamic targets, to show that policy effectiveness (a Nash equilibrium) can continue to exist if some players satisfy the Golden Rule but target values differ between players in their nondynamic targets. We demonstrate the practical importance of these results by showing how policy effectiveness (a policy equilibrium) can appear or disappear with small variations in the expectations process or policy rule in a widely used model of monetary policy with the possibility of target independence.

Suggested Citation

  • Acocella, Nicola & Di Bartolomeo, Giovanni & Hallett, Andrew Hughes, 2007. "Dynamic Controllability With Overlapping Targets: Or Why Target Independence May Not Be Good For You," Macroeconomic Dynamics, Cambridge University Press, vol. 11(2), pages 202-213, April.
    • Handle: RePEc:cup:macdyn:v:11:y:2007:i:02:p:202-213_06
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    Cited by:

    1. Nicola Acocella & Giovanni Di Bartolomeo, 2010. "Conflict of interest and coordination in public good provision," Politica economica, Società editrice il Mulino, issue 3, pages 389-408.
    2. Acocella Nicola & Di Bartolomeo Giovanni, 2007. "Towards a new theory of economic policy: Continuity and innovation," wp.comunite 0020, Department of Communication, University of Teramo.
    3. Huiping Yuan & Stephen M. Miller, 2013. "Target Controllability and Time Consistency: Complement to the Tinbergen Rule," Working papers 2013-35, University of Connecticut, Department of Economics.
    4. Nicola acocella & Giovanni Di Bartolomeo & Andrew Hughes Hallett, "undated". "The theory of economic policy: from a theory of control to a theory of conflict (resolutions)," Working Papers 91/11, Sapienza University of Rome, Metodi e Modelli per l'Economia, il Territorio e la Finanza MEMOTEF.
    5. Acocella, Nicola & Di Bartolomeo, Giovanni, 2008. "The Emerging New Theory of Economic Policy," Economia Internazionale / International Economics, Camera di Commercio Industria Artigianato Agricoltura di Genova, vol. 61(2-3), pages 135-150.
    6. Hallett, Andrew Hughes & Acocella, Nicola & Di Bartolomeo, Giovanni, 2010. "Policy games, policy neutrality and Tinbergen controllability under rational expectations," Journal of Macroeconomics, Elsevier, vol. 32(1), pages 55-67, March.
    7. Hughes Hallett Andrew & Acocella Nicola & Di Bartolomeo Giovanni, 2012. "Expectations Dynamics: Policy, Announcements and Limits to Dynamic Inconsistency," Studies in Nonlinear Dynamics & Econometrics, De Gruyter, vol. 16(2), pages 1-25, April.
    8. Huiping Yuan & Stephen M. Miller, 2011. "The Optimality and Controllability of Discretionary Monetary Policy," Working papers 2011-17, University of Connecticut, Department of Economics.

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