Born in Pusan, Korea, October 2, 1961.
Married. Two children.
Academic positions
In the Department of Statistics, University of North Carolina at Chapel Hill:
Assistant Professor 1987.07 - 1988.06
In the Department of Statistics, Seoul National University:
SNU Distinguished Professor 2024.09 - present
Full Professor 1999.04 - present
Associate Professor 1992.10 - 1999.03
Assistant Professor 1988.06 - 1992.09
Chairman 1999.08 - 2002.01
Academic qualifications
B.Sc., Department of Computer Science and Statistics, Seoul National University, (1982.02)
M.Sc., Department of Computer Science and Statistics, Seoul National University, (1984.02)
Ph.D., Department of Statistics, University of California at Berkeley, (1987.05, under supervision of Peter J. Bickel).
Thesis title : Efficient estimation in the two-sample semiparametric location scale model and the orientation shift model.
Honors and Awards
SNU Distinguished Professor (2024)
The 33rd Inchon Award of Science and Technology (2019)
Carver Medal, Institute of Mathematical Statistics (2018)
Invited lecture in the International Congress of Mathematicians (2018)
Seoul National University Research Award (2017)
Laplace Lecture, The 9th World Congress in Probability and Statistics (2016)
Order of Service Merit, Republic of Korea (2014)
National Academy of Science Award (2014)
Seoul National University - College of Natural Science Research Grand Prize (2013)
Fellow, Korean Academy of Science and Technology (2009)
The 1st Korean Statistical Society Gallup-Korea Award (2006)
Fellow of Institute of Mathematical Statistics (2005)
Fellow of American Statistical Association (2005)
The 1st Junior Statistician Award, Korean Statistical Society (1992)
Membership of learned societies
Elected member of International Statistical Institute since 1995
Member of Institute of Mathematical Statistics since 1985
Member of American Statistical Association since 1985
Member of Korean Statistical Society since 1985
Areas of Research
Structured nonparametric regression
Semiparametric inference
non-Euclidean data analysis
Editorial positions
Associate Editor: Computational Statistics (1992.01.01 - 1997.12.31)
Associate Editor: Journal of Korean Statistical Society (1996.01.01 - 1999.12.31)
Editor: Journal of Korean Statistical Society (2000.01.01 - 2001.12.31)
Editor-in-Chief: Journal of Korean Statistical Society (2002.01.01 - 2004.12.31)
Associate Editor: International Journal of Statistics and Management Systems (2006.01.01 - 2009.12.31)
Editorial Board: IMS Lecture Notes and Monograph Series (2008.01.01 - 2009.12.31)
Editorial Board: IMS Collections (2008.01.01 - 2009.12.31)
Editor-in-Chief: Journal of Korean Statistical Society (2008.01.01 - 2016.12.31)
Associate Editor: Journal of Nonparametric Statistics (2003.09.01 - 2017.10.31)
Associate Editor: Annals of Institute of Statistical Mathematics (2006.01.01 - 2017.10.31)
Advisory Board member: Econometrics and Statistics (2016.01.01 - present)
Associate Editor: Latin American Journal of Probability and Mathematical Statistics (2016.01.01. - present)
Co-editor: Computational Statistics and Data Analysis (2017.01.01 - present)
Associate Editor: Annals of Statistics (2007.01.01 - 2009.12.31; 2013.01.01 - present)
Associate Editor: Journal of American Statistical Association (2017.01.01 - present)
Other posts
Head, Brain Korea 21 "Group for Nonparametric and Semiparametric Estimation of Functions" (1999 - 2005)
IMS Committee on Nominations (2004.09.01 - 2005.08.31, 2007.08 - 2008.08)
Founding Committee for National Mathematical Science Research Institute (2005.03.01 - 2005.08.31)
Director for Research Affairs, The Korean Statistical Society (2006.01.01 - 2007.12.31)
Head, Brain Korea 21 "Research Team for High-dimensional Data and Models" (2006 - 2012)
IMS Committee on Asia and Pacific Rim Meetings (2006.11.17 - 2009.12.15)
Co-Chair, IMS Committee on Asia and Pacific Rim Meeting (2009.12.16 - 2014.12.31)
Vice President, The Korean Statistical Society (2010.01.01 - 2011.12.31)
Ordinary Council member, Bernoulli Society (2013.08 - 2017.08)
Bernoulli Society Representative, Scientific Program Committee, the 60th World Statistics Congress (Rio, Brazil, 2015.07.27 - 2015.07.31)
Elected Council member, International Statistical Institute (2013.08 - 2017.08)
Scientific Secretary, Bernoulli Society (2015.04 - 2019.08)
Head, Brain Korea 21 Plus "Next Generation Training Program for Statistical Sciences" (2016 - 2020)
Elected Council, Institute of Mathematical Statistics (2017.08 - 2020.08)
Vice President, International Statistical Institute (2019.08 – 2023.08)
IMS Committee on Fellows (2020.08 - 2023.08)
President, The Korean Statistical Society (2021.01.01 - 2022.12.31)
Head, Brain Korea 21 FOUR "SNU Future Generation Training Program for Statistical Sciences (2020.09 - 2024.02)
Van Zwat Medal Committee, Bernoulli Society (2021.01.01 - present)
New Researchers Award Committee, Bernoulli Society (2024.07 - present)
David Cox Medal Search Committee (2024.04 - present)
Organization of International Scientific Meetings (since 2001)
Statistical Symposium in Commemoration of the 30th Anniversary of the Korean Statistical Society & the 53rd Session of ISI: Modern Statistical Methods with Prospect and Retrospect (Seoul, August 21-22, 2001)
2002 SRCCS International Statistical Workshop (Seoul, June 19-20, 2002)
International Session on "Nonparametric Curve Estimation" in the 70th Annual Meeting of the Japan Statistical Society (Tokyo, September 7-10, 2002)
The 55th ISI Session IPM 22 "Local Parametric Modelling for Curve Estimation" (Sydney, April 5-12, 2005)
2005 SRCCS International Statistical Workshop (Seoul, June 15-16, 2005)
2006 Taipei International Statistics Workshop (Taipei, December 13-15, 2006)
KSS-JSS-CSA International Sessions in 2008 CSA Annual Meeting (Taipei, December 19, 2008)
Chair of Local Organizing Committee and Scientific Program Committee member. The 1st Institute of Mathematical Statistics - Asia Pacific Rim Meeting (Seoul, June 28-July 1, 2009)
KSS-JSS-CSA International Sessions in 2009 Japan Statistical Society Annual Meeting (Kyoto, September 7-9, 2009)
Co-Chair of Scientific Program Committee. The 2nd Institute of Mathematical Statistics - Asia Pacific Rim Meeting (Japan, July 1-4, 2012; conference website: http://www.ims-aprm2012.org/)
The 58th World Statistics Congress Invited Paper Session 108 "Carrers for Youth" (Dublin, August 21-August 26, 2011)
Theme Day Co-Organizer, The 59th World Statistics Congress (Hong Kong, August 25-August 30, 2013; conference website: http://www.isi2013.hk/)
Co-Chair of Scientific Program Committee. The 3rd Institute of Mathematical Statistics - Asia Pacific Rim Meeting (Taipei, June 29-July 3 2014)
Bernoulli Society Representative, Scientific Program Committee, The 60th World Statistics Congress (Rio, Brazil, July 27-31, 2015)
Co-Chair, The 8th International Conference of the ERCIM WG on Computational and Methodological Statistics (CMStatiatics 2015, December 12-14, 2015, University of London)
Chair, Short Course Committee for the 61st World Statistics Congress (Marrakech, July 16-21, 2017; conference website: http://www.isi2017.org/)
International Program Committee for the 31st International Biometric Conference (Riga, Latvia, July 10-15,2022; conference website: https://www.ibc2022.org/home )
Program Committee, 2022 IMS International Conference on Statistics and Data Science, Florence, December 13-16, 2022
Program Committee, 2023 IMS International Conference on Statistics and Data Science, Lisbon, December 18-21, 2023
Program Committee, 2024 IMS International Conference on Statistics and Data Science, Nice, December 16-19, 2024
Supervision of post-docs and students
16 post-docs(1 current)
31 Ph.D. degree students (6 current)
69 Master degree students (1 current)
Selected publications
Comparison of data-driven bandwidth selectors (with J.S. Marron). Journal of the American Statistical Association, 85, 66-72 (1990).
Efficient estimation in the two sample semiparametric location-scale model. Probability Theory and Related Fields, 86, 21-39 (1990).
Asymptotic minimax estimation in semiparametric models. Probability Theory and Related Fields, 88, 107-120 (1991).
A simple root n bandwidth selector (with M.C. Jones and J.S. Marron). The Annals of Statistics, 19, 1919-1932 (1991).
Smoothed cross-validation (with P. Hall and J.S. Marron). Probability Theory and Related Fields, 92, 1-20 (1992).
A cross-validatory choice of smoothing parameter in adaptive location estimation. Journal of the American Statistical Association, 88, 848-854 (1993).
Efficient semiparametric estimation in stochastic frontier model (with L. Simar). Journal of the American Statistical Association, 89, 929-936 (1994).
Versions of kernel-type regression estimators (with M.C. Jones and S.J. Davies). Journal of the American Statistical Association, 89, 825-832 (1994).
Estimation of non-sharp support boundaries (with W. Haerdle and A.B. Tsybakov). Journal of Multivariate Analysis, 55, 205-218 (1995).
Simple transformation techniques for improved nonparametric regression (with W.C. Kim, D. Ruppert, M.C. Jones, R. Kohn and D.F. Signorini). Scandinavian Journal of Statistics, 24, 145-163 (1997).
A note on design transformation and binning in nonparametric curve estimation (with P. Hall and B. Turlach). Biometrika, 85, 469-476 (1998).
A note on the convergence of nonparametric DEA estimators for production efficiency scores (with A. Kneip and L. Simar). Econometric Theory, 14, 783-793 (1998).
Stochastic panel frontiers : a semiparametric approach (with R.C. Sickles and L. Simar). Journal of Econometrics, 84, 273-301 (1998).
On polynomial estimators of frontiers and boundaries (with P. Hall and S. Stern). Journal of Multivariate Analysis, 66, 71-98 (1998).
On estimation of monotone and concave frontier functions with I. Gijbels, E. Mammen and L. Simar). Journal of the American Statistical Association, 94, 220-228 (1999).
The FDH estimator for productivity efficiency scores: Asymptotic properties (with L. Simar and Ch. Weiner). Econometric Theory, 16, 855-877 (2000).
New methods for bias correction at endpoints and boundaries (with P. Hall). The Annals of Statistics, 30, 1460-1479 (2002).
On local likelihood density estimation (with W.C. Kim and M.C. Jones). The Annals of Statistics, 30, 1480-1495 (2002).
Rolling-ball method for estimating the boundary of the support of a point-process intensity (with P. Hall and B. Turlach). Annales de l'Institut Henri Poincare-Probabilites et Statistiques, 38, 959-971 (2002).
Likelihood-based local polynomial fitting for single index models (with J. Huh). Journal of Multivariate Analysis, 80, 302-321 (2002).
Semiparametric efficient estimation of AR(1) panel data models (with R.C. Sickles and L. Simar). Journal of Econometrics, 117, 279-309 (2003).
Nonparametric detection of correlated errors (with T. Y. Kim, D. Kim and D. G. Simpson). Biometrika, 91, 491-496 (2004).
Bandwidth choice for local polynomial estimation of smooth boundaries (with P. Hall). Journal of Multivariate Analysis, 91, 240-261 (2004).
Bandwidth selection for smooth backfitting in additive models (with E. Mammen). The Annals of Statistics, 33, 1260-1294 (2005).
A simple smooth backfitting method for additive models (with E. Mammen). The Annals of Statistics, 34, 2252-2271. (2006).
Estimation and testing for varying coefficients in additive models with marginal integration (with L. Yang, Lan Xue and W. Härdle). Journal of the American Statistical Association, 101, 1212-1227 (2006).
Large Sample Approximation of the Distribution for Convex-Hull Estimators of Boundaries (with S.-O. Jeong). Scandinavian Journal of Statistics, 33, 139-151 (2006).
A simple estimator of error correlation in nonparametric regression models (with T. Y. Kim, Y. K. Lee, and C. Park). Scandinavian Journal of Statistics, 33, 451-462 (2006).
Semiparametric efficient estimation of dynamic panel data models (with R. C. Sickles and L. Simar). Journal of Econometrics, 136, 281-301 (2007).
Nonparametric stochastic frontiers: a local maximum likelihood approach (with S. K. Kumbhakar, L. Simar and E. G. Tsionas). Journal of Econometrics, 137, 1-27 (2007).
A method for projecting functional data onto a low-dimensional space (with P. Hall and Y. K. Lee). Journal of Computational and Graphical Statistics, 16, 799-812 (2007).
Smooth backfitting in generalized additive models (with K. Yu. and E. Mammen). The Annals of Statistics, 36, 228-260 (2008).
Choice of neighbour order in nearest-neighbour classification with P. Hall and R. Samworth). The Annals of Statistics, 36, 2135-2152 (2008).
Local likelihood estimation of truncated regression and its partial derivatives: Theory and application (with L. Simar and V. Zelenyuk). Journal of Econometrics, 146, 185-198 (2008).
Time series modelling with semiparametric factor dynamics (with S. Borak, Wolfgang Hardle and Enno Mammen). Journal of the American Statistical Association, 104, 284-298 (2009).
Tie-respecting bootstrap methods for estimating distributions of set and functions of eigenvalues (with P. Hall, Y. K. Lee, D. Paul). Bernoulli, 15, 380-401 (2009).
L_2-boosting in kernel regression (with Y. K. Lee and S. Ha). Bernoulli, 15, 599-613 (2009).
Bootstrap-based penalty choice for the lasso, achieving oracle performance (with P. Hall, E. R. Lee). Statistica Sinica, 19, 449-471 (2009).
Practically applicable central limit theorem for spatial statistics (with T.Y. Kim, J.-S. Park and S.Y. Hwang). Mathematical Geosciences, 41, 555-569 (2009).
Using bimodal kernel for inference in nonparametric regression with correlated errors (with T. Y. Kim and M. S. Moon). Journal of Multivariate Analysis, 100, 1487-1497 (2009).
Asymptotic distribution of conical-hull estimators of directional edges (with Seok-Oh Jeong and Leopold Simar). The Annals of Statistics, 38, 1320-1340 (2010).
Backfitting and smooth backfitting for additive quantile models (with Y. K. Lee, Enno Mammen) The Annals of Statistics, 38, 2857-2883 (2010).
Nonparametric conditional efficiency measures: Asymptotic properties (with S.-O. Jeong, L. Simar). Annals of Operations Research, 173, 105-122 (2010).
Sparse varying coefficient models for longitudinal data (with Hoh Suk Noh). Statistica Sinica, 20, 1183-1202 (2010).
Semiparametric regression: efficiency gains from modeling the nonparametric part (with K. Yu and E. Mammen). Bernoulli, 17, 736-748 (2011).
Testing in nonparametric varying coefficient additive models (with Jun H. Hwang and M. S. Park). Statistica Sinica, 21, 749-778 (2011).
Flexible generalized varying coefficient regression models (with Y. K. Lee and Enno Mammen). Annals of Statistics, 40, 1906-1933 (2012).
Projection-type estimation for varying coefficient regression models (with Y. K. Lee and Enno Mammen). Bernoulli, 18, 177-205 (2012).
Principal component analysis in very high-dimensional space (with Y. K. Lee and E. R. Lee). Statistica Sinica, 22, 933-956 (2012).
Sparse estimation in functional linear regression (with E. R. Lee). Journal of Multivariate Analysis, 105, 1-17 (2012).
Time-varying additive models for longitudinal data (with Xiaoke Zhang and Jane-Ling Wang). Journal of the American Statistical Association, 108, 983-998 (2013).
On projection-type estimators of multivariate isotonic functions (with Abdelaati Daouia). Scandinavian Journal of Statistics, 40, 363-386 (2013).
Model selection via Bayesian information criterion for quantile regression models (with E. R. Lee and Hohsuk Noh). Journal of the American Statistical Association, 109, 216-229 (2014).
Efficient estimation for partially linear varying coefficient models when coefficient functions have different smoothing variables (with Seong J. Yang). Journal of Multivariate Analysis, 126, 100-113 (2014).
Backfitting and smooth backfitting in varying coefficient quantile regression (with Y. K. Lee and Enno Mammen). Econometrics Journal, 17, 20-38 (2014).
Asymptotics for in-sample density forecasting (with Y. K. Lee, Enno Mammen and Jens P. Nielsen). Annals of Statistics, 43, 620-651 (2015).
Varying coefficient regression models: A review and new developments (with Enno Mammen, Young Kyung Lee and Eun Ryung Lee). International Statistical Review, 83, 36-76 (with discussion and rejoinder, 2015).
Data envelope fitting with constrained polynomial splines (with Daouia, Abdelaati and Noh, Hohsuk). Journal of Royal Statistical Society, Series B, 78, 3-30 (2016).
Operational time and in-sample density forecasting (with Y. K. Lee, Enno Mammen and Jens P. Nielsen). Annals of Statistics, 45, 1312-1341 (2017).
Smooth backfitting for errors-in-variables additive models (with K. Han). Annals of Statistics, 46, 2216-2250 (2018).
Smooth backfitting for additive modeling with small errors-in-variables, with an application to additive functional regression for multiple predictor functions (with K. Han, Hans-Georg Mueller). Bernoulli, 24, 1233-1265 (2018).
Estimation of errors-in-variables partially linear additive models (with E. R. Lee and K. Han). Statistica Sinica, 28, 2353-2373 (2018).
Singular additive models for function to function regression (with Garliver Chen, Wenwen Tao and Hans-Georg Mueller). Statistica Sinica, 28, 2497-2520 (2018).
Time-dynamic varying coefficient models for longitudinal data (with Kyeongeun Lee, Young Kyung Lee and Seong J. Yang). Computational Statistics and Data Analysis, 123, 50-65 (2018).
Generalised additive dependency inflated models including aggregated covariate (with Y. K. Lee, Enno Mammen and Jens P. Nielsen). Electronic Journal of Statistics, 13, 67-93 (2019).
Additive functional regression for densities as responses (with K. Han, Hans-Georg Mueller). Journal of American Statistical Association, 115, 997-1010 (2020).
Additive regression with Hilbertian responses (with J. M. Jeon). Annals of Statistics, 48, 2671-2697 (2020).
Nonparametric regression with parametric help (with Y. K. Lee, E. Mammen and J. P. Nielsen). Electronic Journal of Statistics, 14, 3845-3868 (2020).
Smooth backfitting for errors-in-variables varying coefficient regression models (with Kyunghee Han and Young K. Lee). Computational Statistics and Data Analysis. https://doi.org/10.1016/j.csda.2019.106909 (2020).
Intrinsic Hoelder classes of density functions on Riemannian manifolds and lower bounds to convergence rates (with Dohyeong Ki). Statistics and Probability Letters. https://doi.org/10.1016/j.spl.2020.108959 (2021).
Additive regression for predictors of various natures and possibly incomplete Hilbertian responses (with Jeong Min Jeon and Ingrid van Keilegom). Electronic Journal of Statistics, 15, 1473-1548 (2021).
Additive regression for non-Euclidean responses and predictors (with Jeong Min Jeon and I. van Keilegom). Annals of Statistics, 49, 2611-2641 (2021).
Locally Polynomial Hilbertian Additive Regression (with Jeong Min Jeon, Young Kyung Lee and Enno Mammen). Bernoulli, 28, 2034-2066 (2022).
Nonparametric regression on Lie groups with measurement errors (with Jeong Min Jeon and I. van Keilegom). Annals of Statistics, 50, 2973-3008 (2022).
Additive models for symmetric positive-definite matrices and Lie groups (with Z. Lin and H.-G. Mueller). Biometrika, 110, 361-379 (2023).
Exponential concentration for geometric-median-of-means on non-positive curvature spaces (with Ho Yun). Bernoulli, 29, 2927-2960 (2023).
Additive regression with parametric help (with Hyerim Hong and Young Kyung Lee) . Bernoulli, 29, 3059-3092 (2023).
Partially linear additive regression with a general Hilbertian response (with Sungho Cho, Dongwoo Kim and Kyusang Yu). Journal of American Statistical Association, 119, 942-956. (2024)
Efficient functional Lasso kernel smoothing for high-dimensional additive regression (with Eun Ryung Lee, Seyoung Park and Enno Mammen). Annals of Statistics, 52, 1741-1773. (2024)
last update : 2024.09.10.