In this note I discuss the condition for indeterminacy in the context of search models with increasing returns in the matching technology. Building on the theoretical framework set forth by Giammarioli (2003), I argue that increasing returns with respect to vacancies at the aggregate level is only a necessary requirement for indeterminate equilibrium paths. Specifically, I show that sunspot equilibria can actually be obtained by imposing an additional condition between the private and the social elasticity of the matching function with respect to unemployment.
Increasing Returns in Matching and Labour Market Dynamics: Comments on Indeterminacy and Search Theory
GUERRAZZI, MARCO
2015-01-01
Abstract
In this note I discuss the condition for indeterminacy in the context of search models with increasing returns in the matching technology. Building on the theoretical framework set forth by Giammarioli (2003), I argue that increasing returns with respect to vacancies at the aggregate level is only a necessary requirement for indeterminate equilibrium paths. Specifically, I show that sunspot equilibria can actually be obtained by imposing an additional condition between the private and the social elasticity of the matching function with respect to unemployment.
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