Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A GMM Approach for Non-monotone Missingness on Both Treatment and
  Outcome Variables   I examine the common problem of multiple missingness on both the endogenous
treatment and outcome variables. Two types of dependence assumptions for
missing mechanisms are proposed for identification, based on which a two-step
AIPW GMM estimator is proposed. This estimator is unbiased and more efficient
than the previously used estimation methods. Statistical properties are
discussed case by case. This method is applied to the Oregon Health Insurance
Experiment and shows the significant effects of enrolling in the Oregon Health
Plan on improving health-related outcomes and reducing out-of-pocket costs for
medical care. There is evidence that simply dropping the incomplete data
creates downward biases for some of the chosen outcome variables. Moreover, the
estimator proposed in this paper reduced standard errors by 6-24% of the
estimated effects of the Oregon Health Plan.

19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio