In her analysis of a multivariate regression constructed by one of her colleagues, Beth doubts if the regression residuals are positively correlated with several of the independent variables. She then regresses the squared residuals against the independent variables. The results of her hypothesis test indicate that the regression residuals, while uncorrelated within themselves, are strongly correlated with the independent variables.

The estimation bias described in this example is ______. The appropriate remedy to mitigate this form of estimation bias is ______.

Explanation: The estimation bias described in this example is conditional heteroskedasticity. There are two methods to correct for conditional heteroskedasticity: the computation of robust standard errors, and generalized least squares.