Measuring health-relevant businesses over 21 years: refining the National Establishment Time-Series (NETS) a dynamic longitudinal data set

摘要

BackgroundThe densities of food retailers, alcohol outlets, physical activity facilities, and medical facilities have been associated with diet, physical activity, and management of medical conditions. Most of the research, however, has relied on cross-sectional studies. In this paper, we assess methodological issues raised by a data source that is increasingly used to characterize change in the local business environment: the National Establishment Time Series (NETS) dataset.