The following results show your estimation when including in the regression: = 0.50 0.10 0.01 (2) (0.20) (0.06) (0.03) = 247, R2 = 0.24 How does the coefficient change as a result of adding ? What does this indicate about the overall omitted variable bias, and the components going into the omitted variable bias? Is there empirical evidence of this in the results shown in (2)