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Stat 5101 Lecture Notes - School of Statistics

Stat 5101 Lecture Notes - School of Statistics

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114 <strong>Stat</strong> <strong>5101</strong> (Geyer) Course <strong>Notes</strong>we see that, because the integrand is bounded, only the behavior <strong>of</strong> the integrandnear infinity is important. And for large xx1+x 2 ≈ 1 xand so by Lemma 2.39 the integral does not exist. Hence by Theorem 2.44neither does any moment <strong>of</strong> first or higher order. That is, no moments exist.The Cauchy location-scale family has densitiesf µ,σ (x) =σπ(σ 2 +[x−µ] 2 , −∞

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