• Assistant Professor, Department of Economics, University of North Carolina at Chapel Hill, July 2008 - present
• Research Affiliate, Institute for the Study of Labor (IZA), March 2008 - present
• Visiting Scholar, Federal Reserve Bank at St. Louis, August 2008
• Officer, Korean Army, 1989-2003

• Evaluation and Analysis Officer, Korean Army, 2001-2003

• Full-time Lecturer, Department of Economics and Management, Korea Military Academy, 1994-1997
• Lecturer, Department of Economics and Management, Korea Military Academy, 1993-1994

• Ph.D. in Economics, Vanderbilt University, May 2008

• Dissertation: "Inference on Partially Identified Parameters - With Applications to the Evaluation of Heterogeneous Treatment Effects"
• Advisor: Yanqin Fan

• M.A. in Economics, Korea University, Seoul, Korea, 1993

• Thesis: "On the Choice of Functional Forms in Estimation - With an Application to Gross Production Function of Korea" (in Korean)
• Advisor: Sang-Kyung Kwak

• B.S. in Physics, Korea Military Academy, Seoul, Korea, 1989

• Partially Identified Econometric Models
• Estimation and Inference on Distributional Treatment Effects
• Theory of Income Distributions

• "Sharp Bounds on the Distribution of Treatment Effects and their Statistical Inference" (with Yanqin Fan), accepted in Econometric Theory, 2010. http://dx.doi.org/doi:10.1017/S0266466609990168
• Partial Identification of the Distribution of Treatment Effects and its Confidence Sets" (with Yanqin Fan), Advances in Econometrics: Nonparametric Econometric Methods 25, 2009
• "Confidence Intervals for the Quantile of Treatment Effects in Randomized Experiments" (with Yanqin Fan), revised and resubmitted
• "A Study on the Development of Models for the Optimal Requirement Level of the CSP" (with Kyu Heon Lee, in Korean), Journal of Military Operational Research, vol 23, pp 63-75, 1997
• "Social Optimality of Environmentally Motivated Taxes" (with Seung Jun Kwak, in Korean), Resource and Environmental Economics Study, vol. 5, pp 25-38, 1996
• "A Study on Dynamic Effects of Defense Expenditures on the Korean Economy with an Error Correction Model" (with Young Lak Ahn, in Korean), Journal of National Defense, 1996-winter, pp86-103, 1996

• "The Analysis of Housing Choices in Korea," (with Chunggi Lee), working paper
• "Simple Confidence Intervals for Conditional Quantiles," (with Yanqin Fan), work in progress
• "Heterogeneous Effects of Class Size Reduction: Re-Visiting Project STAR," working paper
• "Estimation of Treatment Effects in the Existence of Zero Propensity Score Sets," work in progress
• "The Mixing Problem in Program Evaluation: Inference," working paper
• "Confidence Sets for Some Partially Identified Parameters" (with Yanqin Fan), manuscript, 2009

• 2009-2010 : Economic Application of Statistical Analysis, Cross Sectional Econometrics (Department of Economics, University of North Carolina at Chapel Hill)
• 2008-2009 : Economic Application of Statistical Analysis, Nonparametric and Semiparametric Econometrics (Department of Economics, University of North Carolina at Chapel Hill)
• 2007 Summer: Math Camp (Co-Instructor with Brett Benson, Department of Political Science, Vanderbilt University)
• 2006 Fall: Economic Statistics (Department of Economics, Vanderbilt University)
• 2005 Summer: Economic Statistics (Department of Economics, Vanderbilt University)
• 1993-1997: Principles of Economics, Managerial Science (Department of Economics and Management, Korea Military Academy)

• Researcher on Research Project "The Estimation of Optimal Requirement for Concurrent Spare Parts (CSP)" (Leader: Hyu Heon Lee) , Hwarangdae Research Institution (attached to Korea Military Academy), 1996
• Researcher on Research Project "The Dynamics of Defense Expenditure in Korea" (Leader: Chul-Hee Lee), Hwarangdae Research Institution (attached to Korea Military Academy), 1995
• Researcher on Research Project "A Study on Optimal Defense Expenditure" (Leader: Young Lak Ahn), Hwarangdae Research Institution (attached to Korea Military Academy), 1994

• Seminars in University of Washington, Korea University, Yonsei University, University of Montreal, 2009
• "Partial Identification of the Distribution of Treatment Effects and its Confidence Sets," Korean Econometric Society, June 2009
• "Heterogeneous Effects of Class Size Reduction: Re-Visiting Project STAR," Triangle Econometrics Conference, December 2008
• "Partial Identification of the Distribution of Treatment Effects and its Confidence Sets," Advances in Econometrics Conference (AIE), November 2008
• "Effect of Class Size Reduction: Re-Examination of Project STAR," Labor/Applied Micro Workshop, Department of Economics, University of North Carolina, October 2008
• "Confidence Sets for the Quantile of the Treatment Effects," International Symposium on Econometric Theory and Applications (SETA), May 2008
• "Effect of Class Size Reduction: Re-Examination of Project STAR," Southern Economics Association Meeting, November 2007
• "Confidence Sets for Some Partially Identified Parameters," Departmental Seminar, Department of Economics, Vanderbilt University, November 2007
• "Sharp Bounds on the Distribution of Treatment Effects and their Statistical Inference," Midwest Econometric Group, October 2007
• "Confidence Sets for Some Partially Identified Parameters," Canadian Econometrics Study Group, September 2007
• "Effect of Class Size Reduction: Re-Examination of Project STAR," Annual Graduate Student Research Symposium, Graduate School of Vanderbilt University, April 2007
• "Sharp Bounds on the Distribution of the Treatment Effects and their Statistical Inference," Department of Economics, Vanderbilt University, 2007
• "A Study on Two-Dimensional Inequality Indices," Annual Graduate Student Research Symposium, Graduate School of Vanderbilt University, April 2006

• 2010 Empirical Economics, Quantitative Economics, Review of Economics and  Statistics
• 2009 Advances in Econometrics(1)
• 2008 Advances in Econometrics (1)
• 2006 American Economic Review (1), Journal of Nonparametric Statistics (1)
• 2005 Economic Bulletin (1), Econometrica (1)

• Graduate Student Travel Grant, Vanderbilt University, 2007
• The Noel Dissertation Fellowship, Vanderbilt University, 2007
• Scholarship for Prospect Professors of the Korean Military Academy, Korean Army, 1991-1993

• Council of Economics Graduate Students (CEGS), Vanderbilt University, 2006-2007
• Representative of CEGS in Graduate Students Council (GSC), Vanderbilt University, 2006-2007
• Member of Academic Affairs Committee in GSC, Vanderbilt University, 2006-2007

• American Economic Association, Econometric Society, Southern Economics Association