Short Answer
Omitted variable bias a. will always be present as long as the regression
b. is always there but is negligible in almost all economic examples
c. exists if the omitted variable is correlated with the included regressor but is not a determinant of the dependent variable
d. exists if the omitted variable is correlated with the included regressor and is a determinant of the dependent variable
Correct Answer:

Verified
Correct Answer:
Verified
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