Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regression Adjustments under Covariate-Adaptive Randomizations with
  Imperfect Compliance   We study regression adjustments with additional covariates in randomized
experiments under covariate-adaptive randomizations (CARs) when subject
compliance is imperfect. We develop a regression-adjusted local average
treatment effect (LATE) estimator that is proven to improve efficiency in the
estimation of LATEs under CARs. Our adjustments can be parametric in linear and
nonlinear forms, nonparametric, and high-dimensional. Even when the adjustments
are misspecified, our proposed estimator is still consistent and asymptotically
normal, and their inference method still achieves the exact asymptotic size
under the null. When the adjustments are correctly specified, our estimator
achieves the minimum asymptotic variance. When the adjustments are
parametrically misspecified, we construct a new estimator which is weakly more
efficient than linearly and nonlinearly adjusted estimators, as well as the one
without any adjustments. Simulation evidence and empirical application confirm
efficiency gains achieved by regression adjustments relative to both the
estimator without adjustment and the standard two-stage least squares
estimator.

14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex