from which an alternative expression for Σ1 follows,
Σ1 =
E[(Z4 - 2Z2) ρc(Z)] - bc
E [Z2ρc(Z)] - bc
From (9),
Eφ [(Z4 - 6Z2 + 3)(Z2 - 1 - 2IF)]
= Eφ ((Z4 - 6Z2 + 3)2)
= 24Eφ [(Z4 - 6Z2 + 3)(Z2 - 1 - 2IF)]
= 1 EΦ [(Z4 - 6Z2) Pc(Z)] +3bc
(20)
= 12 E [Z2ρc(Z)] - bc ,
from which it is straightforward that 4 - 12d = Σ1, and thus EFn (m 1) =
o(p-1). Replacing pn with √n∣e, we obtain
0 0
b = lim ∖E∣'n-. [ Wm ( Y ; θn )] = el 0
n→∞
6
and
δ = bV+b =3 e 2.
B.2 Skewed normal alternative
Let γn = e/y/n and Fn = FγSn. Let β be estimated by an M-estimator of
location (e.g. the median). Then βn and σn are the solutions of
where ψ is an odd function, non-decreasing, not identically zero, and differ-
entiable a.e., and
n )1
σn
=0,
(21)
E (-½) 1= bc, (22)
σn
29
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