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Article Dans Une Revue PLoS ONE Année : 2021

Crisis Propagation in a Heterogeneous Self-Reflexive DSGE Model

Federico Guglielmo Morelli
  • Fonction : Auteur
Michael Benzaquen
Jean-Philippe Bouchaud
Marco Tarzia

Résumé

We study a self-reflexive DSGE model with heterogeneous households, aimed at characterising the impact of economic recessions on the different strata of the society. Our framework allows to analyse the combined effect of income inequalities and confidence feedback mediated by heterogeneous social networks. By varying the parameters of the model, we find different crisis typologies: loss of confidence may propagate mostly within high income households, or mostly within low income households, with a rather sharp crossover between the two. We find that crises are more severe for segregated networks (where confidence feedback is essentially mediated between agents of the same social class), for which cascading contagion effects are stronger. For the same reason, larger income inequalities tend to reduce, in our model, the probability of global crises. Finally, we are able to reproduce a perhaps counter-intuitive empirical finding: in countries with higher Gini coefficients, the consumption of the lowest income households tends to drop less than that of the highest incomes in crisis times.
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Dates et versions

hal-03378921 , version 1 (14-10-2021)

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Federico Guglielmo Morelli, Michael Benzaquen, Jean-Philippe Bouchaud, Marco Tarzia. Crisis Propagation in a Heterogeneous Self-Reflexive DSGE Model. PLoS ONE, 2021. ⟨hal-03378921⟩
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