Estados Unidos
One of the main factors that act as catalysts for small business creation seems to be the existence of business clusters. This study uses both standard and spatial statistics methodologies and tools to analyze the dynamics of small business clusters and the degree to which it is influenced by Marshall-Arrow-Romer or Jacobs effects. The study contributes to better understanding of the influence that industrial diversity or specialization has on the growth of the number of small businesses and, consequently, on small businesses cluster formation. Maybe the most significant finding of this study is that the evidence suggests that Marshall-Arrow-Romer effects are preponderant. Indeed, the study finds significant MAR dynamic effects for the period under scrutiny, as well as Marshall-Arrow-Romer static effects for 2005.