Take the Gammamodel f (x j ,) () x1ex , x 0. Assume
Question:
Take the Gammamodel f (x j ®,¯) Æ
¯®
¡(®)
x®¡1e¡¯x , x È 0.
Assume ¯ is known, so the only parameter to estimate is ®. Let g (®) Æ log¡(®). Write your answers in terms of the derivatives g 0(®) and g 00(®). (You need not get the closed formsolution for these derivatives.)
(a) Calculate the information for ®.
(b) Using the general formula for the asymptotic distribution of the MLE to find the asymptotic distribution of p
n(b®
¡®) where b®
is the MLE.
(c) Letting V denote the asymptotic variance from part (b), propose an estimator b V for V .
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