Question: For the regression equation given in problems 4-25, the form of heteroscedasticity is 2 i i Var(???? |x ) = ???? ????, and i j

For the regression equation given in problems 4-25, the form of heteroscedasticity is 2 i i Var(???? |x ) = ???? ????, and i j E(???? , ???? ) = 0, ???? i ???? j. Given a sample of observations on Y and X’s, then discuss the maximum likelihood (ML)

method to estimate the heteroscedastic model.

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