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Finally, the new estimators make it easier for the researcher to get better approximations to their distributions using saddlepoint approximations. Email alerts Article activity alert. Close mobile search navigation Article Navigation. Don't already have an Oxford Academic account? If you originally registered with a username please use that to sign in. First of all, there is no need to estimate in an initial step a weight matrix as required in the conventional estimation procedure. Fourth, in an empirical example one of the new estimators is shown to perform better than the conventional estimators. Most users should sign in with their email address. Sign in via your Institution Sign in.

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