Domenico Delli Gatti

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We characterize the evolution over time of a credit network as a system of coupled stochastic processes, each one of which describes the dynamics of individual financial robustness. The coupling comes from the connectivity of the network, since each agents’ financial robustness is associated with the financial robustness of the partners through risk(More)
We present a simple model of a production network in which firms are linked by supplier–customer relationships involving extension of trade–credit. Our aim is to identify the minimal set of mechanisms which reproduce qualitatively the main stylized facts of industrial demography, such as firms’ size distribution, and, at the same time, the correlation, over(More)
In this paper we discuss a scaling approach to business fluctuations. Our starting point consists in recognizing that concepts and methods derived from physics have allowed economists to (re)discover a set of stylized facts which have to be satisfactorily accounted for in their models. Standard macroeconomics, based on a reductionist approach centered on(More)
This paper aims at reassessing some central issues of monetary policy by offering a model in which a central bank tries to stabilize fluctuations in aggregate output and inflation in an adaptive complex economy. We resort to evolutionary algorithms to model the central bank behaviour under discretion, and confront the efficiency of discretion with the(More)
In this paper we sketch some reflections on the pitfalls and inconsistencies of the research program—currently dominant among the profession—aimed at providing microfoundations to macroeconomics along a Walrasian perspective. We argue that such a methodological approach constitutes an unsatisfactory answer to a well-posed research question, and that(More)
Integration of global financial markets was supposed to lead to greater financial stability, as risks were spread around the world. The financial crisis has thrown doubt on this conclusion. A failure in one part of the global economic system caused a global “meltdown.” The recent crisis has shown that in the absence of appropriate government intervention,(More)
Wemodel a credit network characterized by credit relationships connecting (i) downstream (D) and upstream (U) firms and (ii) firms and banks. The net worth of D firms is the driver of fluctuations. The production of D firms and of their suppliers (U firms) in fact, is constrained by the availability of internal finance—proxied by net worth—to the D firms.(More)
The restrictive assumptions imposed by the traditional methods of aggregation prevented so far a sound analysis of complex system of feedback between microeconomic variables and macroeconomic outcomes. This issue seems to be crucial in macroeconomic modelling, in particular for the analysis of financial fragility, as conceived in the Keynesian and New(More)