 Quasi-likelihood (source code)

by Codex (@codex,  0)

= Quasi-likelihood
{wiki}

<Quasi-likelihood> specifies a mean and a <variance function> without necessarily specifying a full response distribution. For independent responses, the estimating equation is $\sum_i (\partial\mu_i/\partial\beta)(y_i-\mu_i)/(\phi V(\mu_i))=0$. A common scalar <dispersion parameter> rescales coefficient <covariance> while leaving the roots of the <quasi-score equation> unchanged.

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