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                                                                                  UC彩票

                                                                                  論壇講座

                                                                                  論壇講座

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                                                                                  第4期“計量、金融和大數據分析專題研討會” 通知

                                                                                  2019-03-28  

                                                                                    【講座時間】:3月29日(週五)上午9:00-11:00

                                                                                    【講座地點】:UC彩票 ,107會議室

                                                                                    【講座標題】:Estimating Endogenous Treatment Effect Using High-Dimensional Instruments with an Application to the Olympic Effect

                                                                                    【摘要】:Endogenous treatments are commonly encountered in program evaluations using observational data where the selection-on-observables assumption does not hold. In this paper, we develop a two-stage approach to estimate endogenous treatment effects using high-dimensional instrumental variables. In the first stage, instead of using a linear reduced form regression in the conventional two-stage least squares approach, we propose a new high-dimensional logistic reduced form model with the SCAD penalty to approximate the optimal instrument. In the second stage, we replace the original treatment variable by its estimated propensity score and run a least squares regression to obtain the penalized Logistic-regression Instrumental Variables Estimator (LIVE). We show that the proposed LIVE is root-n consistent to the true average treatment effect, asymptotically normal and achieves the semiparametric efficiency bound. Monte Carlo simulations demonstrate that the LIVE outperforms the traditional TSLS estimator and the post-Lasso estimator for the endogenous treatment effects. Moreover, in the empirical study, we investigate whether the Olympic Games could facilitate the host nation's economic growth using data from 163 countries. The proposed LIVE estimator shows a strong Olympic effect on the host nation's economic growth.

                                                                                    This is a joint work with Wei Zhong, Wei Zhou and Yang Gao.

                                                                                    【主講人】:範青亮(副教授)

                                                                                    【主講人簡介】:廈門大學王亞南經濟研究院、UC彩票統計系副教授 ,博士生導師 ,入選福建省“高校傑出青年科研人才培育計劃” 。主要研究成果發表於Journal of Econometrics, Journal of Business & Economic Statistics等國際頂級刊物和IEEE GlobalSIP等重要國際會議 。


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