Natural Exponential Family - Natural Exponential Families With Quadratic Variance Functions (NEF-QVF)

Natural Exponential Families With Quadratic Variance Functions (NEF-QVF)

A special case of the natural exponential families are those with quadratic variance functions. Six NEFs have quadratic variance functions (QVF) in which the variance of the distribution can be written as a quadratic function of the mean. These are called NEF-QVF. The properties of these distributions were first described by Carl Morris.

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