Question: When you have an omitted variable problem in a regression, the CLRM assumption that E ( u i | X i ) = 0 is

When you have an omitted variable problem in a regression, the CLRM assumption that E(ui | Xi) = 0 is violated. This implies that _____

Group of answer choices

the sum of the residuals (sample regression errors) is not zero.

there is another estimator called weighted least squares, which is BLUE.

the sum of the residuals times any of the explanatory variables is not zero.

the OLS estimator is not consistent.

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