Question: 19.5 Construct an example of a regression model that satisfies the assumption E(ui Xi) = 0 but for which E(U X )

19.5 Construct an example of a regression model that satisfies the assumption E(ui  Xi) = 0 but for which E(U  X )  0n.

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18.5 Construct an example of a regression model that satisfies the assumption E(ui Xi) = 0 but for which E(U X ) 0n.

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