现在位置:首页 > 学术报告
 

 

Academy of Mathematics and Systems Science, CAS
Colloquia & Seminars

Speaker:

丁鹏 教授, Department of Statistics, UC Berkeley

Inviter:  
Title:
Combining multiple observational data sources to estimate causal effects
Time & Venue:
2018.1.8 10:00-11:00 S309
Abstract:
The era of big data has witnessed the increasing availability of multiple data sources for statistical analyses. As an important example in causal inference, we consider estimation of causal effects combining big main data with unmeasured confounders and smaller validation data with supplementary information on these confounders. Under the unconfoundedness assumption with completely observed confounders, the smaller validation data allow for constructing consistent estimators for causal effects, but the big main data can only give error-prone estimators in general. However, by leveraging the information in the big main data in a principled way, we can improve the estimation efficiencies while still preserve the consistencies of the initial estimators based solely on the validation data. The proposed framework incorporates asymptotically normal initial estimators, including the commonly-used regression imputation, weighting, and matching estimators, and does not require a correct specification of the model relating the unmeasured confounders with the observed variables. Coupled with appropriate bootstrap procedures, our method is straightforward to implement requiring only software routines for existing estimators.

报告人介绍: Peng Ding is an Assistant Professor in the Department of Statistics, UC Berkeley. He obtained B.S. in math, B.A. in economics and M.S. in statistics from Peking University, and Ph.D. in statistics from Harvard University. His research interest is causality.
 

 

附件下载:
 
 
【打印本页】【关闭本页】
电子政务平台   |   科技网邮箱   |   ARP系统   |   会议服务平台   |   联系我们   |   友情链接