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Invariances and Diversities in the Patterns of Industrial Evolution: Some Evidence from Italian Manufacturing Industries

机译：产业演进模式中的不变性与多样性：来自意大利制造业的一些证据

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摘要

This work explores and compares some basic properties of corporate growth process at both aggregate manufacturing level and disaggregated sectoral levels. Using an extensive dataset on Italian manufacturing firms, we investigate which properties of firm growth dynamics are robust under disaggregation. We compare the results obtained with three different definitions of firm size, namely total sales, number of employees and value added. Our analysis suggests that while different sectors are characterized by significant differences in firm size distributions, in the degrees of concentration and in the autoregressive structure of the growth processes, there are also regularities which hold across all of them, such as the approximate unit root nature of the growth process and the power exponential shape of the growth rates density. Together, these “stylized facts” suggest challenging puzzles on the drivers of corporate growth and the resulting industrial structures.
机译：这项工作探索并比较了总增长水平和部门分解水平的公司增长过程的一些基本属性。通过使用有关意大利制造公司的大量数据集，我们研究了在分解情况下公司增长动力的哪些属性很强。我们将获得的结果与公司规模的三个不同定义进行比较，即总销售额，员工人数和增加值。我们的分析表明，尽管不同行业的特征是企业规模分布，集中度和增长过程的自回归结构存在显着差异，但所有行业也存在规律性，例如近似的单位根性质生长过程的密度和增长率密度的幂指数形状。这些“风格化事实”加在一起，对企业发展的驱动力和由此产生的产业结构提出了具有挑战性的难题。

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