The objective of this paper is to estimate the relationship between agglomeration economies and the birth of new firms in U.S. manufacturing sectors during 2004–2012. I examine the variations in Marshallian factors across MSAs and across counties within MSAs. My findings support the existence of Marshallian agglomeration forces: input sharing, labor market pooling, and knowledge spillovers, with input–output linkages particularly important. I then examine the variations in Marshallian factors across regions and find regional differences are not very strong. In addition, large‐sized firms appear to be more responsive to a supplier‐customer relationship. Moreover, my empirical results provide evidence that firms in highly concentrated industries react more to input linkage and labor pooling.

中文翻译：

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进入的决定因素：来自美国新制造企业的证据

本文的目的是估计2004-2012年间集聚经济体与美国制造业中新公司的诞生之间的关系。我研究了跨MSA和跨MSA的县间的Marshallian因子的变化。我的发现支持马歇尔集聚力量的存在：投入共享，劳动力市场汇集和知识溢出，其中投入产出联系特别重要。然后，我研究了跨地区的马歇尔因素的变化，发现区域差异不是很明显。此外，大型公司似乎对供应商-客户关系的反应更快。此外，我的实证结果提供了证据，表明高度集中行业中的公司对投入的联系和劳动力聚集的反应更大。