Indeterminacy and expectation-driven fluctuations with non-separable preferences

We consider a continuous-time two-sector infinite-horizon model with sector-specific externalities, endogenous labor and a concave homogeneous non-separable utility function. We show that local indeterminacy arises with a low elasticity of intertemporal substitution in consumption provided the wage elasticity of the labor supply and the elasticity of substitution between consumption and leisure are low enough. Such a result cannot hold with additively separable preferences for which local indeterminacy requires a large enough elasticity of intertemporal substitution in consumption.