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Informational externalities, strategic delay, and optimal investment subsidies

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  • Matthew Doyle

Abstract

This paper examines optimal government policy when private investment generates information, but investors cannot internalize the informational value their actions have to others. Equilibrium exhibits inefficient delay, as investors adopt a wait‐and‐see approach. The government can alter incentives via an investment subsidy, but complications arise, since future subsidies may induce investors to disregard current policy initiatives. The paper shows that the government achieves its desired outcome only when the the investment subsidy is financed by a non‐distortionary, lump‐sum tax. When taxation is distortionary, the government faces a time inconsistency problem that may prevent effective policy. Ce texte examine la politique optimale du gouvernement quand l’investissement privé engendre de l’information, mais que les investisseurs ne peuvent pas internaliser la valeur informationnelle que leurs actions ont sur les autres. L’équilibre est marqué par des délais inefficaces à proportion que les investisseurs adoptent une attitude attendre‐pour‐voir. Le gouvernement peut modifier les incitations en créant une subvention à l’investissement, mais des complications sont possibles puisque des subventions possibles dans l’avenir peuvent amener les investisseurs à ne pas se prévaloir des initiatives mises de l’avant par la politique courante. Le texte montre que le gouvernement atteint le résultat désiré seulement quand la subvention à l’investissement est financé par une taxe forfaitaire non distorsionnante. Quand la taxe crée des distorsions, le gouvernement fait face à un problème d’inconsistance dans le temps qui empêche que la politique soit effective.

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  • Matthew Doyle, 2010. "Informational externalities, strategic delay, and optimal investment subsidies," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 43(3), pages 941-966, August.
  • Handle: RePEc:wly:canjec:v:43:y:2010:i:3:p:941-966
    DOI: 10.1111/j.1540-5982.2010.01601.x
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    1. Heidhues, Paul & Melissas, Nicolas, 2012. "Rational exuberance," European Economic Review, Elsevier, vol. 56(6), pages 1220-1240.

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    More about this item

    JEL classification:

    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • H2 - Public Economics - - Taxation, Subsidies, and Revenue

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