Table 12 Test statistics for different β across race and joint significance of β at different potential experience within each race

 Potential experience 1–3 years

0.28 (0.59)

6.30 (0.01)

1.20 (0.27)

3.43 (0.06)

 Potential experience 4–6 years

0.03 (0.86)

1.13 (0.29)

1.75 (0.19)

0.65 (0.42)

 Potential experience 7–9 years

1.02 (0.31)

0.25 (0.61)

0.80 (0.37)

0.09 (0.76)

 Potential experience 10–12 years

3.35 (0.07)

0.15 (0.70)

0.01 (0.93)

2.61 (0.11)

 Joint significance of β for whites

1.77 (0.13)

0.58 (0.68)

2.30 (0.06)

0.32 (0.86)

 Joint significance of β for African Americans

4.01 (0.00)

3.61 (0.01)

2.27 (0.06)

3.29 (0.01)