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

For the regression equation given in problem 4-25, if the form of heteroscedasticity is 2 ????

i i i Var(???? |x ) = ???? z , where i z is a non-stochastic variable and which will be identical or a function of X’s, discuss the ML method to estimate the heteroscedastic model.

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