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Original Articles

Capital externalities in two-sector modelsFootnote

Pages 183-195 | Received 27 Mar 2006, Accepted 05 Oct 2006, Published online: 07 Mar 2007
 

Abstract

We consider a two-sector economy with positive capital externalities and constant social returns. We first show that local indeterminacy does not require external effects from labor but is fundamentaly based on externalities derived from capital in the investment good sector. Second, we show that the external effects in the investment good sector has to be characterized by a low enough amount of capital stock from the consumption good sector. In other words, the existence of multiple equilibria is ruled out if the externalities are too intersectoral.

Keywords:

Notes

I am infinitely delighted to contribute to this special issue in honor of Kazuo Nishimura. During my PhD, he has been a teacher, working on his outstanding contributions to optimal growth theory and intertemporal equilibrium models. A few years later, I had the immense privilege of meeting him and starting a fantastic collaboration with him. Now Kazuo is a wonderful friend. I am extremely happy to acknowledge his influence on my work and to thank him for his confidence. I also thank an anonymous referee for useful comments and suggestions.

See more recently Lloyd-Braga et al. [Citation9].

See Boldrin and Rustichini [Citation5], Drugeon and Venditti [Citation6], Venditti [Citation12].

See also Benhabib et al. [Citation4].

Nishimura and Venditti [Citation10] consider a similar formulation and show that with non-increasing social returns and capital externalities in the consumption good sector only, multiple equilibria arise when the investment good is capital intensive at the private level.

See also Harrison and Weder [Citation8].

Notice indeed that if and then .

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