Yuchung Wang

Areas of Specialization

Categorical data analysis, multivariate dependence, conditionally specified distributions, and quality engineering (Taguchi Method).

Education

Rutgers University 1980 Ph.D. Applied Statistics and Computing
Rutgers University 1975 M.S. Statistics
National Tsing-Hua Univ. 1973 M.S. Probability Theory and Applied Mathematics
National Tsing-Hua Univ. 1970 B.S. Mathematics

Dissertation

Title: Analyses of ordered and Partially Ordered Categorical Data

Director: Paul W. Holland

Experience

2012 – present Professor in Statistics
Department of Mathematical Sciences
Rutgers University, Camden, New Jersey
1987 – 2012 Associate Professor in Statistics
Department of Mathematical Sciences
Rutgers University, Camden, New Jersey
1998 Visiting Associate Professor
Marshall School of Business
University of Southern California
1988 – 1994 Associate Research Fellow
Institute of Statistical Science
Academia Sinica
Taiwan, Republic of China
1993 Visiting Associate Professor
Graduate School of Business
The University of Chicago
1981 – 1987 Assistant Professor in Statistics
Department of Mathematical Sciences
Rutgers University
Camden, New Jersey.
1980 – 1981 Statistical and Computer Consultant
Educational Testing Service
Princeton, New Jersey.
1979 – 1980 Section Chief, Biostatistics
Block Drug Company, Inc.
Jersey City, New Jersey.
1978 – 1979 Collaborate Research Associate
Division of Data Analysis, Measurement and Statistics
Educational Testing Service
Princeton, New Jersey.
1975 – 1978 Graduate Assistant
Center for Computer Information Service
Rutgers University
New Brunswick, New Jersey.
1975 – 1988 Statistical Consultant
Partial clients list: Ortho Pharmaceutical Corp., Raritan, N.J.;
Hydron Laboratory, New Brunswick, N.J.;
Immunobiology Research Institute, N. J;
Bristol – Meyers International, New York, N.Y.;
Pace University, New York, N.Y.,
Sanofi-Aventis, Paris et . al.

Papers Published in Refereed Journals

  1. Comparisons of three approaches for discrete conditional models. Communications in Statistics-Simulations and Computation. Accepted and in production.
  2. A simple algorithm for checking compatibility among discrete conditional Distributions. (with Kun-Lin Kuo), Journal of computational statistic and data analysis. 2011, 55, 2457-2462.
  3. Gibbs Ensembles for nearly compatible and incompatible conditional models. (with Shyh-Huei Chen and Eddie H. Ip), Journal of computational statistic and data analysis. 2011, 55, 1760-1769.
  4. Compatibility for multivariate discrete distributions with structural zeros. (with Kun-Lin Kuo), Journal of Multivariate Analysis. 2010, 101, 191-199.
  5. Canonical Representation of Conditionally Specified Discrete Distributions. (With Eddie. H. Ip), Journal of Multivariate Analysis. 2009, 100, 1281-1290. doi:10.1016/j.jmva.2008.11.010
  6. Conditionally Specified Continuous Distributions. (with Eddie.H. Ip), Biometrika, 2008, 95, 735-746.
  7. A Note on Cuts for Contingency Tables. (with Eddie H. Ip), Journal of Multivariate Analysis, 2008, 99, 2356-2363. doi:10.1016/j.jmva.2008.02.022
  8. Locally Dependent Latent Trait Models for Polytomous Responses with Application to Inventory Hostility. (with Eddie H. Ip, P. D. Boeck and M. Meulders), Psychometrika, 2004, 69, 191-216.
  9. Compatibility among Marginal Densities. Biometrika, 2004, 91, 234-239.
  10. Structural Decompositions of Multivariate Density with Applications in Moment and Cumulant. (with Eddie H. Ip and Y. Yeh), Journal of Multivariate Analysis 2004, 89, 119-134.
  11. Some Equivalence Results Concerning Multiplicative Lattice Decompositions of Multivariate Density. (with Eddie H. Ip and Y. Yeh), Journal of Multivariate Analysis, 2003, 84, 403-409.
  12. (lead article) A Strategy for Designing Telescoping Models for Analyzing Multiway Contingency Tables Using Mixed Parameters. (with Eddie H. Ip), Sociological method and Research, 2003, 31, 292-324.
  13. Deterministic Lot-Size Inventory Models with Shortages and Deterioration for Fluctuating Demand. (with James Teng), Operation Research Letter, 1999, 24, 65-72.
  14. Multivariate Normal Integrals and Contingency Tables with Ordered Categories. Psychometrika, 1997, 62, 267-284.
  15. Designing Outer Array Points. (with K.J. Lin and K.T. Fang), Journal of Quality Technology, 1995, 27, 226-241.
  16. Construction of Continuous Bivariate Density Functions. Statistica Sinica, 1993, 3, 173-87.
  17. The Role of Statistics in Quality Engineering. (with H. L. Oh), Journal of the Chinese Institute of Industrial Engineers, 1991, 2, 49-57.
  18. Regional Dependence for Continuous and Discrete Bivariate Random Variables”, Journal of the Chinese Statistical Association, 1989, 1, 87-98.
  19. An approximation for Computing Orthant Probability Integral for Multivariate Normal Distribution of Dimension 4: A Contingency-table Approach. Communications in Statistics, 1987, 4, 985-997.
  20. Dependence Function for Continuous Bivariate Random Variable. (with Paul W. Holland), Communications in Statistics, 1987, 3, 863-876.
  21. Regional Dependence for Continuous Bivariate Random Variable. (with Paul W. Holland), Communications in Statistics, 1987, 1, 193-206.
  22. (lead article) Stochastic Blockmodels for Directed Graphs. (with G. Wong), Journal of American Statistical Association, 1987, 1, 8-19.
  23. Probability Integral for Bivariate Normal Distributions: A Contingency-table Approach. Biometrika, 1987, 74, 185-190.
  24. An Order-dependent Parameterization of Multinomial Distributions. Scandinavia Journal of Statistics, 1986, 3, 199-205.
  25. A note on the positive-part estimator of multivariate means. (with T.F. Li), Journal of Organizational Behavior and Statistics, 1985, 2, 119-121.

Works in Progress

  1. “Canonical ensemble for incompatible or nearly compatible dependence networks”. (with Eddie K. Ip and Shyh-Huei Chen), under revision.
  2. “Gibbs sampler: an interaction-based approach” (with Kun-Lin Kuo). Submitted to Journal of Multivariate Analysis.
  3. “Reproducible Interactions for Multivariate Dependence”. Under preparation.
  4. “Calculus of Probability Density Functions” in progress.
  5. “A fresh look at the running-time analysis for the Gibbs sampler” Submitted to Journal of Statistical Computation.
  6. “Statistical analysis of circular relationship” (with P. Jean Valayer and Ben C. Kirkup), in progress.

Papers Published in Proceedings of American Statistical Association, Section on Statistical Computing

  1. “Gibbs ensemble for incompatible dependence networks”. (with Stephen Ko), to appear in Proceeding 2009 American Statistical Association.
  2. “Improvements on Likelihood-based Data Squashing” (with Xiaodong Sun), Proceeding 2004 American Statistical Association, Section on Statistical computing, 2564-6.
  3. “Probability Integrals of Multivariate Normal Distribution: A Contingency-table Approach”, Proceeding 1986 American Statistical Association, Section on Statistical computing, 273-5.

Technical Reports

Technical Document: JCL for SPSS, Version 6.0 (CCIS, Rutgers)

Technical Document: Helpful Hints in Using SAS76 (CCIS, Rutgers)

Technical Report: Analysis of Ordered and Partially Ordered Categorical Data (Educational Testing Service)

Technical Report: Regional Dependence for Continuous Bivariate Random Variable (Educational Testing Service)

Referee for Journal of the American Statistical Association, Psychometrika, Communications in Statistics, Statistica Sinica and Journal of Multivariate Analysis. 2010: Biometrika, Statistics and Probability Letters, Journal of Multivariate Analysis.

Associate Editor for Journal of the Chinese Statistical Association (1989-1991).

Papers Presented

  1. “Gibbs Ensemble for Nearly Compatible and Incompatible Conditional Models”. Department of Mathematics, National Central University, Taiwan, ROC. June 3, 2010.
  2. “Introduction to Gibbs Sampling with Applications”. Department of Applied mathematics, Fu-Jen University, Taiwan ROC. June 2, 2010.
  3. “Gibbs Ensemble for Nearly Compatible and Incompatible Conditional Models” Department of Risk Management, Nan-Kai University, Taiwan, ROC. June 4, 2010.
  4. “A survey of Recent Developments in Compatibility Checks for Conditionally Specified Models.” School of Business, Fu-Jen University, Taiwan, ROC. June 11, 2010.
  5. “Canonical Ensembles for Incompatible Conditional Models.” Institute of Statistical Science, Academia Sinica, Taiwan, ROC, June 14, 2010.
  6. “Mixed Parameterization of Multivariate Continuous Densities”, Institute of Mathematics, Academia Sinica, Taiwan, R.O.C., May 18, 2009.
  7. “Canonical Representation of Conditionally Specified Discrete Distributions”, Department of Applied Mathematics, National Ching-Chih University, Taiwan, R.O.C., May 13, 2009.
  8. “From P1 Model to P2 Model: Stochastic Modeling of Directed Graphs”, Institute of Sociology, Academia Sinica, Taiwan, R.O.C., May 4, 2009.
  9. “Comparisons of Three Approaches for Discrete Conditional Models”, Institute of Statistical Science, Academia Sinica, Taiwan, R.O.C., April 27, 2009.
  10. “Gibbs Ensembles for Incompatible Dependence Networks”, Institute of Statistical Science, Academia Sinica, Taiwan, R.O.C., April 27, 2009.
  11. “Conditionally Specified Models” Institute of Statistical Sciences, Academia Sinica, Taipei, Taiwan August 2006
  12. “Improvements on Likelihood-based Data Squashing” 2004 Joint Statistical Meeting, Toronto, Ontario, Canada August 12, 2004.
  13. “Compatibility among Marginal Densities” 2003 Joint Statistical Meeting, San Francisco, Ca. August 10, 2003.
  14. “Scientific Method, Observational Analysis and Statistical Thinking” The Council for Research Excellency at Rutgers¬-Camden, November 24, 1997.
  15. “Equivalence of simultaneous ML and two-step ML in estimating polychoric correlation coefficient” 1997 Joint Statistical Meeting, Anaheim, California, August 1997.
  16. “Designing outer array points” Sydney, Australia, July 1996.
  17. “Entropy: A Performance Measure Independent of Adjustment” Department of Statistics, Harvard University, December 2, 1992.
  18. “Diversity measures: Performance measures independent of adjustment” 1992 Joint Statistical Meeting, Boston, Massachusetts, August 1992.
  19. “Entropy: A Performance Measure Independent of Adjustment” ICSA 1992 Applied Statistics Symposium, New Brunswick, New Jersey, May 1992.
  20. “Entropy: A Performance Measure Independent of Adjustment” CPC, General Motors Corporation, Michigan, November 1991.
  21. “Entropy: A Performance Measure independent of Adjustment” Boston University, Massachusetts, October 1991.
  22. “Linear Models for Multiway Contingency Tables” (with M.D. Lee and M.T. Choa) 1991 Joint Statistical Conference, Atlanta, GA. August 1991.
  23. “Statistical Technology” XV Pacific Science Congress, Hawaii, June 1991 .
  24. “Orthant Probabilities for Multivariate Normal Distributions: A Contingency-table Approach,” American Statistical Association Winter Conference, Orlando, Florida, January 1987.
  25. “Probability Integrals for Multivariate Normal Distributions: A Contingency-table Approach,” Academic Sinica, Taipei, Taiwan, March 1987.
  26. “Probability Integrals for Multivariate Normal Distributions: A Contingency-table Approach,” Temple University, Philadelphia, Pennsylvania, December 1986.
  27. “Probability Integrals for Multivariate Normal Distributions: A Contingency-table Approach,” American Statistical Association, Chicago, Illinois, August 1986.
  28. “Stochastic block model for social network,” (with George Wong) American Statistics Association, Las Vegas, Nevada, August 1985.
  29. “Probability integral of bivariate normal distribution: A contingency table approach,” American Statistics Association, Las Vegas, Nevada, August 1985.
  30. “Differential equation with integral equations as boundary conditions,” Rutgers University, Camden, New Jersey, February 1985.
  31. “Intrinsic dependence for continuous bivariate density function,” University of Connecticut, Storrs, Connecticut, November 1984.
  32. “A family of proper Bayes minimax estimators for the multivariate normal means,” 29th NBER-NSF Seminar on Bayesian Conference in Economics, New Brunswick, New Jersey, October 1984.
  33. “Quasi-independent and regional dependence,” American Statistical Association, Philadelphia, Pennsylvania, August 1984.
  34. “Intrinsic Dependence Between Two Random Variables: Can the Continuous Learn from the Discrete?” (with Paul Holland). Special Invited Talk, 1981 IMS Annual Meeting, Denver, Colorado.

Awards

  1. Competitive Scholarship, Graduate School of Business, University of Chicago 1993.
  2. Shamberg Scholarship, Marshall School of Business, University of Southern California. 1998.
  3. First prize in the essay competition in celebration of the twenty-fifth anniversary of World Journal Newspaper, White Stone, New York. 2001

Grant Proposals Submitted

  1. “Probability integral of multivariate normal distributions: A contingency-table approach” to National Science Foundation.
  2. “A Unix-based computer system for computer science” to Department of Higher Education, State of New Jersey.
  3. “Interactive statistical computing” to Council for Instructional Improvement, Rutgers University.
  4. “A Unix-based computer system for computer science” to AT&T Computer Equipment donation.

Grants Received

  1. Rutgers University Research Council. 1982
  2. Equipment Grant of a complete 3B5 Computer System and fourteen terminals from AT&T. 1987
  3. National Science Council, Taiwan, Republic of China, from January 1989 to July 1993.
  4. U.S. Department of Education: “Psychometric Effects of Item Clustering Around Passages in National Assessment of Education Progress”. Co-investigator. 1999-2000

Committee

  • University Senate (1982-88) served on Executive Committee, Equal Opportunity Committee and Research Policy Committee.
  • University Senate (2003-2010) served on Committee on Instruction, Curriculum and Advising; Academic Standard, Regulations and Admission Committee.
  • Committee on Teaching Evaluation (1985-1986).
  • Search Committee for Chair of Computer Science Department (1995 – 1996).
  • Grievance Committee (1999, 2008).