Question: Take St St1 et with S0 0 and et i.i.d. (0,2). (a) Calculate E[St ] and var[St ]. (b) Set Yt (St
Take St Æ St¡1 Ået with S0 Æ 0 and et i.i.d. (0,¾2).
(a) Calculate E[St ] and var[St ].
(b) Set Yt Æ (St ¡E[St ])/
p var[St ]. By construction E[Yt ] Æ 0 and var[Yt ] Æ 1. Is Yt stationary?
(c) Find the asymptotic distribution of Ybnr c for r 2 [±,1].
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