ESTIMATION OF MIXTURE PROPORTIONS 1369 or equivalently gxŽ.Ž .Ž. exp 01 x fx, distributions dF xŽ.Ž . Ž., exp 01 x dF x, Ž.Ž .Ž.1 exp 01 x dF x, Ž.1.3 respectively. We can see easily that if gxŽ.Ž.and fxare normal densities with common variance or exponential densities, then 1Ž..2 is satisfied.
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