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Weird Ties? : Growth, Cycles and Firms Dynamics in an Agent Based-Model with Financial Market Imperfections

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  • Domenico Delli Gatti
  • Mauro Gallegati

Abstract

The paper investigates how the interplay between business cycles and long-run growth shapes the dynamics of economies characterized by financial market imperfections. Most of standard economic literature has centered the analysis of decentralized economies on the representative agent hypothesis (REH), often treating short-run and long-run phenomena with distinct sets of models. However models based on the REH have encountered increasing difficulties in accounting for many observed regularities (e.g. the properties of firms and countries growth rates distributions). We propose a simple agent-based model with financial market imperfections and costly-adoption of new technologies which is able to jointly replicate many stylized facts characterizing macroeconomic time-series as well as properties of firms size and firms growth rates distributions. Such regularities emerge from the nested dynamics between short-run demand shocks and long-run productivity shocks. We show that, if unequal access to credit is assumed, productivity shocks have asymmetric effects in the short run. Therefore they can reinforce or weaken the dynamics already induced by demand shocks. Moreover, credit constraints reduce firms" ability to afford better technologies and to smooth the impact of adverse shocks. Thus, even small demand shocks can cause large and persistent fluctuations

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Bibliographic Info

Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2004 with number 288.

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Date of creation: 11 Aug 2004
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Handle: RePEc:sce:scecf4:288

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Keywords: Financial Market Imperfections; Business Fluctuations; Economic Growth; Firm Size; Firm Growth; Agent-Based Model;

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