Severini, Thomas A.; Tripathi, Gautam - In: Foundations and Trends(R) in Econometrics 6 (2013) 3-4, pp. 163-397
In this survey, we evaluate estimators by comparing their asymptotic variances. The role of the efficiency bound, in this context, is to give a lower bound to the asymptotic variance of an estimator. An estimator with asymptotic variance equal to the efficiency bound can therefore be said to be...
