In this paper we study a class of evolutionary models of industrial agglomeration with local positive feedbacks, which allow for a wide set of empirically-testable implications. Their roots rest in the Generalized Polya Urn framework. Here, however, we build on a birth-death process over a...

Economies of agglomeration are central in understanding the emergence of industrial clustering. However, existing models that incorporate economies of agglomeration to explain industrial concentration have been providing a quite small set of empirically testable predictions. In this paper, we...

This highly preliminary work attempts to study the multiple drivers of agglomeration phenomena in contemporary economies. First, we propose a tentative taxonomy of agglomeration drivers in which the conditions of knowledge accumulation play a paramount role. Second, we discuss the achievements...

This work explores the spatial structure of location of production activities. We try to disentangle location- from sector-specific drivers in the dynamic process of spatial agglomeration. We argue that the former typically apply "horizontally" (i.e. across all industrial sectors), while the...

The work studies the processes of growth of the world top 150 pharmaceutical firms, on the grounds of an original database which allows also disaggregate analysis at the level of single therapeutical classes and chemical entities.Our findings show that the industry -whose long-term evolution is...

In this work we explore some basic properties of the size distributions of firms and of their growth processes both at aggregate and disaggregate levels. First, we investigate which properties of firms size distributions and growth dynamics are robust under disaggregation. Second, at a...

The paper compares the properties of market dynamics, under different trading protocols. At an empirical level, we present some evidence stemming from the comparison between different intra-daily trade regimes within the world largest Stock Exchanges. Such evidence also motivates the...

The work studies the properties of a coordination game in which agents repeatedly compete to be in the population minority. The game reflects some essential features of those economic situations in which positive rewards are assigned to individuals who behave in opposition to the modal behavior...

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In this work we explore the interplay between entry, selection and innovative learning as determinants of industrial evolution. We propose a model aimed to capture the essential features of learning and competition as drivers of the dynamics. Using both analytical and numerical techniques, we...