Specifically, in the presence of heteroskedasticity, the OLS estimators may not be efficient (achieve the smallest variance). In addition, the estimated standard errors of the coefficients will be biased, which results in unreliable
Specifically, in the presence of heteroskedasticity,the OLS estimators may not be efficient (achieve the smallestvariance). In addition, the estimated standard errors of thecoefficients will be biased, which results in unreliable