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Table 2 Mean differential analysis for unemployment rates in the U.S

From: The impact of the coronavirus on African American unemployment: lessons from history

Panel A. Pre-September 11—Post September 11 attacks means differential analysis
A.1. African Americans
  Pre-911 UER Post-911 UER Mean Differential t-statistic (p-value)
Mean 10.81 9.75 -1.06 -5.38 (0.000)
S.D 1.95 0.97   
N 143 77   
A.2. White Americans
  Pre-911 UER Post-911 UER Mean Differential t-statistic (p-value)
Mean 4.85 4.62 − 0.23 − 2.33 (0.01)
S.D 0.98 .48   
N 143 77   
Panel B. Pre-2008- Post 2008 means differential analysis
B.1 African Americans
  Max 2008 UER Post-2008 UER Mean Differential t-statistic (p-value)
Mean 13.56 10.2 − 3.36 − 5.96 (0.000)
S.D 2.75 3.36   
N 35 111   
B.2. White Americans
  Max 2008 UER Post-2008 UER Mean Differential t-statistic (p-value)
Mean 7.44 5.14 − 2.3 − 6.87
(0.000)
S.D 1.75 1.65   
N 35 111   
Panel C. 2018 crisis means differential analysis
C.1. African Americans
  Post 9/11 UER Max 2018 Crisis UER Mean Differential t-statistic (p-value)
Mean 9.75 13.56 3.81 7.97 (0.000)
S.D 0.97 2.75   
N 77 35   
C.2. White Americans
  Post 9/11 UER Max 2018 Crisis UER Mean Differential t-statistic (p-value)
Mean 4.62 7.44 2.82 9.37 (0.000)
S.D 0.48 1.75   
N 77 35