We introduce a model of proportional growth to explain the distribution of business firm growth rates. The model predicts that it is exponential in the central part and depicts an asymptotic power-law behavior in the tails with an exponent ζ = 3. Because of data limitations, previous studies in...

Complex systems can be characterized by classes of equivalency of their elements defined according to system specific rules. We propose a generalized preferential attachment model to describe the class size distribution. The model postulates preferential growth of the existing classes and the...

We present a preferential attachment growth model to obtain the distribution P(K) of number of units K in the classes which may represent business firms or other socio-economic entities. We found that P(K) is described in its central part by a power law with an exponent φ = 2+b/(1−b) which...

We introduce a model of proportional growth to explain the distribution P(g) of business firm growth rates. The model predicts that P(g) is Laplace in the central part and depicts an asymptotic power-law behavior in the tails with an exponent ζ = 3. Because of data limitations, previous studies...

Industrial districts palyed a very important role in the Italian economic development. This paper provides fresh evidence based on microdata (Veneto Worker Histories) and discusses the ambiguities in the district definition, its uncertain boundaries and the development into territorial...

The bulk of the global innovative effort takes place in 5 countries: USA, Japan and China as leaders, with France and United Kingdom as immediate followers, which all display, on the long run, a negative marginal value added on innovation. The present paper attempts to answer the following...

The study focused on the early stage of Romania’s transition to the market economy during 1990-1992, based on statistical data available at that time. Because of the inherited structural distortions, the persistence of strong forces of inertia and the incoherence of economic and monetary...

For several reasons the capital goods industry (CGI) is strategic for Brazil. This study aims to analyze this industry’s recent behavior in a period when the Brazilian economy regained momentum. We will evaluate some opportunities for several segments in the Brazilian economy by breaking down...