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

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Author Info
Pedro Rui Mazeda Gil () (CEF.UP and Faculdade de Economia, Universidade do Porto)

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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.

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Publisher Info
Paper provided by Universidade do Porto, Faculdade de Economia do Porto in its series FEP Working Papers with number 336.

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Length: 25 pages
Date of creation: Sep 2009
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Handle: RePEc:por:fepwps:336

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Related research
Keywords: endogenous growth; horizontal and vertical R&D; stationary sunspot equilibria;

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Find related papers by JEL classification:
O41 - Economic Development, 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 and Pricing - - - 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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