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. 2020 Oct 30;89:102894. doi: 10.1016/j.jtrangeo.2020.102894

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Fig. 4 — Percentage of labor forces in essential businesses across income groups at county level. We have adjusted the labor force based on their percentage of workers who could work at home by industry (the data is from the 2019 Department of Labor). We also specified an unadjusted run, and the results are similar. The error bars are standard deviations. The income ratio is defined as the ratio of a county's personal income per capita to the personal income per capita of the state to which it belongs.