The goal of this paper is to develop techniques to simplify semiparametric inference. We do this by deriving a number of numerical equivalence results. These illustrate that in many cases, one can obtain estimates of semiparametric variances using standard formulas derived in the...

Many structural economics models are semiparametric ones in which the unknown nuisance functions are identifiÂ…ed via nonparametric conditional moment restrictions with possibly non-nested or overlapping conditioning sets, and the Â…finite dimensional parameters of interest are...