Ononot — In the context of M-estimation with the estimator defined by

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Inferential Statisticshard

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In the context of M-estimation with the estimator defined by the estimating equation $\sum_{i=1}^{n} \psi(X_i, \hat{\theta}) = 0$ , what does the 'sandwich' covariance matrix $\hat{V} = \frac{1}{n} A^{-1} B A^{-1}$ account for when the model is misspecified?