Power law behavior is an emerging property of many economic models. In this paper we emphasize the fact that power law distributions are persistent but not time invariant. In fact, the scale and shape of the firms' size distribution fluctuate over time. In particular, on a log–log space, both...

This paper presents an agent based model which underlines the importance of credit network and leverage dynamics in determining the resilience of the system, defining an early warning indicator for crises. The model reproduces macroeconomic dynamics emerging from the interactions of...

In this paper we analyze the Ancona wholesale fish market (MERITAN) where transactions take place in three simultaneous Dutch auctions. Our objective is to characterize the behavior of market participants and, in particular, that of buyers in such a market structure. Our analysis shows that...

We analyze the average size distribution of a pool of the G7 group's firms over the period 1987–2000. In particular, firm sizes are measured employing different proxies, and after conditioning on business cycle phases. We find that: (i) the empirical distributions are all consistent with a...

<i> Analisi delle relazioni fra la sostenibilità del ciclo dell'acqua e il sistema economico </i> (di Fabio Fiorillo, Antonio Palestrini, Paolo Polidori, Claudio Socci) - ABSTRACT: It is well known that the water cycle is going to assume a central role in the economic system because of its increasing...

This paper investigates 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,...

Our analysis, conducted using the GDP and the GDP deflator time series (OECD source; 1960–2001) for the G7 countries, shows the robustness of the negative covariance between the GDP and its deflator, but only over long run horizons. Through wavelet decomposition we evaluate the price–output...

In this paper we show how a simple modification of a well-known multiplicative process of firms' growth, taking into account common and idiosyncratic elements, allows to reconcile an old aggregate-sector puzzle (Quandt, 1966) on firms'' size distribution reported in the literature.

Are expansions and recessions more likely to end as their magnitude increases? In this paper we apply parametric hazard models to investigate this issue in a sample of 16 countries from 1881 to 2000. For the total sample we find evidence of positive magnitude dependence for recessions, while for...