ABSTRACT Broadband deployment policies have directly subsidized fiber providers because fiber broadband delivers fast download speeds. This article examines whether recent fiber buildout has increased competition for Asymmetric Digital Subscriber Lines (aDSL) and cable incumbents and whether entry by a fiber competitor predicts faster incumbent download speeds. Despite significant growth in fiber broadband service in the United States between 2014 and 2019, the number of fiber competitors in census blocks with aDSL or cable incumbents remains low. Further, our econometric results, while not interpretable as causal relationships, suggest that the entry of a rival fiber operator does not explain recent increases in cable and aDSL speeds.

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美国光纤市场的宽带速度：实证分析

摘要 宽带部署政策直接补贴了光纤提供商，因为光纤宽带提供了快速的下载速度。本文研究了最近的光纤扩建是否增加了对非对称数字用户线 (aDSL) 和现有电缆的竞争，以及光纤竞争对手的进入是否预示着现有的更快下载速度。尽管 2014 年至 2019 年间美国的光纤宽带服务显着增长，但在人口普查区拥有 aDSL 或现有电缆的光纤竞争者数量仍然很少。此外，我们的计量经济学结果虽然不能解释为因果关系，但表明竞争对手光纤运营商的进入并不能解释最近电缆和 aDSL 速度的增加。