no code implementations • 10 Oct 2023 • Toru Kitagawa, Sokbae Lee, Chen Qiu
We consider a decision maker who faces a binary treatment choice when their welfare is only partially identified from data.
no code implementations • 25 Aug 2023 • Xiaohong Chen, Sokbae Lee, Yuan Liao, Myung Hwan Seo, Youngki Shin, Myunghyun Song
We introduce a new class of algorithms, Stochastic Generalized Method of Moments (SGMM), for estimation and inference on (overidentified) moment restriction models.
no code implementations • 3 Aug 2023 • Raffaella Giacomini, Sokbae Lee, Silvia Sarpietro
We propose a method for forecasting individual outcomes and estimating random effects in linear panel data models and value-added models when the panel has a short time dimension.
no code implementations • 22 May 2023 • Sungyoon Lee, Sokbae Lee
In recent years, there has been a significant growth in research focusing on minimum $\ell_2$ norm (ridgeless) interpolation least squares estimators.
no code implementations • 4 Apr 2023 • Junlong Feng, Sokbae Lee
We introduce a novel framework for individual-level welfare analysis.
no code implementations • 2 Apr 2023 • Syngjoo Choi, Kyu Sup Hahn, Byung-Yeon Kim, Eungik Lee, Jungmin Lee, Sokbae Lee
This paper investigates whether ideological indoctrination by living in a communist regime relates to low economic performance in a market economy.
no code implementations • 29 Sep 2022 • Sokbae Lee, Yuan Liao, Myung Hwan Seo, Youngki Shin
Big data analytics has opened new avenues in economic research, but the challenge of analyzing datasets with tens of millions of observations is substantial.
1 code implementation • 27 May 2022 • Sung Jae Jun, Sokbae Lee
The log odds ratio is a well-established metric for evaluating the association between binary outcome and exposure variables.
no code implementations • 17 May 2022 • Toru Kitagawa, Sokbae Lee, Chen Qiu
The literature focuses on the mean of welfare regret, which can lead to undesirable treatment choice due to sensitivity to sampling uncertainty.
1 code implementation • 9 Nov 2021 • Sokbae Lee, Martin Weidner
Our bounds are designed to be robust in challenging situations, for example, when the conditioning variables take on a large number of different values in the observed sample, or when the overlap condition is violated.
no code implementations • 18 Aug 2021 • Syngjoo Choi, Byung-Yeon Kim, Jungmin Lee, Sokbae Lee
The study compares the competitiveness of three Korean groups raised in different institutional environments: South Korea, North Korea, and China.
1 code implementation • 6 Jun 2021 • Sokbae Lee, Yuan Liao, Myung Hwan Seo, Youngki Shin
We develop a new method of online inference for a vector of parameters estimated by the Polyak-Ruppert averaging procedure of stochastic gradient descent (SGD) algorithms.
no code implementations • 25 Aug 2020 • Xiaohong Chen, Sokbae Lee, Myung Hwan Seo, Myunghyun Song
Many economic panel and dynamic models, such as rational behavior and Euler equations, imply that the parameters of interest are identified by conditional moment restrictions with high dimensional conditioning instruments.
no code implementations • 20 Jul 2020 • Sokbae Lee, Bernard Salanié
Multivalued treatments are commonplace in applications.
1 code implementation • 15 Jul 2020 • Sokbae Lee, Serena Ng
The result arises because the sketched estimates in the case of random projections can be expressed as degenerate $U$-statistics, and under certain conditions, these statistics are asymptotically normal with homoskedastic variance.
3 code implementations • 17 Apr 2020 • Sung Jae Jun, Sokbae Lee
We study causal inference under case-control and case-population sampling.
1 code implementation • 6 Dec 2018 • Sung Jae Jun, Sokbae Lee
This paper examines a commonly used measure of persuasion whose precise interpretation has been obscure in the literature.
1 code implementation • 23 Nov 2018 • Le-Yu Chen, Sokbae Lee
We consider a high dimensional binary classification problem and construct a classification procedure by minimizing the empirical misclassification risk with a penalty on the number of selected features.