Self-similar measures in multi-sector endogenous growth models

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Chaos, Solitons & Fractals, ISSN: 0960-0779, Vol: 79, Page: 40-56

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La Torre, Davide; Marsiglio, Simone; Mendivil, Franklin; Privileggi, Fabio
Elsevier BV
Mathematics; measures; multi; sector; endogenous; growth; models; self; similar; Business
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article description
We analyze two types of stochastic discrete time multi-sector endogenous growth models, namely a basic Uzawa–Lucas (1965, 1988) model and an extended three-sector version as in La Torre and Marsiglio (2010). As in the case of sustained growth the optimal dynamics of the state variables are not stationary, we focus on the dynamics of the capital ratio variables, and we show that, through appropriate log-transformations, they can be converted into affine iterated function systems converging to an invariant distribution supported on some (possibly fractal) compact set. This proves that also the steady state of endogenous growth models— i.e., the stochastic balanced growth path equilibrium—might have a fractal nature. We also provide some sufficient conditions under which the associated self-similar measures turn out to be either singular or absolutely continuous (for the three-sector model we only consider the singularity).