Proceedings of the American Mathematical Society, Vol. 81, No. 1 (Jan., 1981), pp. 107-110 (4 pages) Let $B$ be a Banach space. It is well known that for every ...
This paper shows that the semiparametric efficiency bound for a parameter identified by an unconditional moment restriction with data missing at random (MAR) coincides with that of a particular ...
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