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. 2020 Nov 23;10:20367. doi: 10.1038/s41598-020-77292-8

Table 2.

Analysis of county fixed effects.

Dependent variable County fixed effect of each county

Log(Pop. Density of Each County)

(People/Sq. Miles)

0.4410***

(0.0096)

Fraction of Black Residents

in Each County

0.8084***

(0.0979)

Fraction of Hispanic Residents

in Each County

1.3438***

(0.1003)

Percentage of Commuters using Pub.

Transportation in each county

5.0215***

(0.4140)

Log(Median Income of Each County)

(in U.S. dollars)

1.3387***

(0.0579)

Percentage of Senior

Residents of Each County ( 70 years)

1.8825***

(0.5255)

Percentage of Children

Residents of Each County ( 18 years)

0.6614

(0.4733)

Constant

− 16.6781***

(0.6462)

R_squared 0.69
Counties 2,923

*** p < 0.01, ** p < 0.05, * p < 0.1.