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Animal Spirits and the Composition of Innovation in a Lab-Equipment R&D Model

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  • Pedro Rui Mazeda Gil

    () (CEF.UP and Faculdade de Economia, Universidade do Porto)

Abstract

We revisit the issue of self-fulfilling “waves of enthusiasm” as stationary rational expectations equilibrium outcomes in endogenous-growth models that merge the quality-ladders with the expanding-variety mechanism. By considering a lab-equipment specification with vertical-innovation intertemporal spillovers but no intersectoral spillovers, we extend previous results of a negative impact of animal spirits on both horizontal aggregate R&D and number of firms to a framework where decreasing returns to horizontal entry are not a necessary condition. In contrast, our general-equilibrium setting allows us to predict an effect of animal spirits on R&D composition impacting neither on aggregate growth nor on aggregate vertical R&D, as reduced outlays in “mature” industries compensate for the increased R&D intensity in newly-born industries.

Suggested Citation

  • Pedro Rui Mazeda Gil, 2009. "Animal Spirits and the Composition of Innovation in a Lab-Equipment R&D Model," FEP Working Papers 336, Universidade do Porto, Faculdade de Economia do Porto.
  • Handle: RePEc:por:fepwps:336
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    References listed on IDEAS

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    More about this item

    Keywords

    endogenous growth; horizontal and vertical R&D; stationary sunspot equilibria;

    JEL classification:

    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure

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