$E \left( \frac { 1 } { n - 2 } \sum _ { i = 1 } ^ { n } \hat { u } _ { i } ^ { 2 } \right)$

Multiple Choice

$E \left( \frac { 1 } { n - 2 } \sum _ { i = 1 } ^ { n } \hat { u } _ { i } ^ { 2 } \right)$

A) is the expected value of the homoskedasticity only standard errors.
B) $= \sigma _ { u } ^ { 2 }$
C) exists only asymptotically.
D) $= \sigma _ { u } ^ { 2 } / ( \mathrm { n } - 2 )$