2026 Robert I. Jennrich: Mathematics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Mathematics	36	2575	2295	1064	892	84	10375

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Mathematics

2575

2295

1064

892

10375

Research.com Recognitions

1981 - Fellow of the American Statistical Association (ASA)

Overview

Robert I. Jennrich is affiliated with the University of California, Los Angeles in the United States. Their academic and research career is associated primarily with this institution.

The scientist has been recognized as a Fellow of the American Statistical Association (ASA) since 1981, a distinction reflecting a significant professional standing within the statistical community.

There are no recorded co-authors or frequent publication venues associated with Robert I. Jennrich in the available data. Similarly, no specific main or subfields of study or defined research topics have been listed.

No information about recent papers, including titles, years of publication, or venues, has been provided. Likewise, there is no data on book publications or contributions to particular publishers.

Best Publications

Unbalanced repeated-measures models with structured covariance matrices

Robert I. Jennrich;Mark D. Schluchter

1675
Citations
Asymptotic Properties of Non-Linear Least Squares Estimators

Unknown

1487
Citations
Gradient Projection Algorithms and Software for Arbitrary Rotation Criteria in Factor Analysis

Coen A. Bernaards;Robert I. Jennrich

630
Citations
Rotation for simple loadings

R. I. Jennrich;P. F. Sampson

620
Citations
Dud, A Derivative-Free Algorithm for Nonlinear Least Squares

Mary L. Ralston;Robert I. Jennrich

469
Citations
An Asymptotic χ2 Test for the Equality of Two Correlation Matrices

Robert I. Jennrich

384
Citations
Exploratory Bi-factor Analysis.

Robert I. Jennrich;Peter M. Bentler

362
Citations
BMDP-79, biomedical computer programs, P-series

Wilfrid Joseph Dixon;M. B. Brown;L. Engelman;J. W. Frane

345
Citations
Application of Stepwise Regression to Non-Linear Estimation

R. I. Jennrich;P. F. Sampson

304
Citations
Acceleration of the EM Algorithm by using Quasi‐Newton Methods

Mortaza Jamshidian;Robert I. Jennrich

291
Citations
Conjugate Gradient Acceleration of the EM Algorithm

Unknown

203
Citations
Newton-Raphson and Related Algorithms for Maximum Likelihood Variance Component Estimation

R. I. Jennrich;P. F. Sampson

199
Citations
A study of algorithms for covariance structure analysis with specific comparisons using factor analysis

Sik-yum Lee;R. I. Jennrich

195
Citations
Exploratory Bi-factor Analysis: The Oblique Case.

Robert I. Jennrich;Peter M. Bentler

172
Citations
Standard errors for EM estimation

Mortaza Jamshidian;Robert I. Jennrich

162
Citations
Asymptotics of Estimating Equations under Natural Conditions

Ke-Hai Yuan;Robert I. Jennrich

129
Citations
A Newton-Raphson algorithm for maximum likelihood factor analysis

Robert I. Jennrich;Robert I. Jennrich;Stephen M. Robinson;Stephen M. Robinson

128
Citations
A simple general procedure for orthogonal rotation

Robert I. Jennrich

123
Citations
A simple general method for oblique rotation

Robert I. Jennrich

118
Citations
STANDARD ERRORS FOR OBLIQUELY ROTATED FACTOR LOADINGS

Robert I. Jennrich

105
Citations
Admissible values of γ in direct oblimin rotation

Robert I. Jennrich

93
Citations
Rotation to Simple Loadings using Component Loss Functions: The Oblique Case

Robert I. Jennrich;Robert I. Jennrich

93
Citations

Frequent Co-Authors

Mark O. Goodarzi Cedars-Sinai Medical Center

Peter M. Bentler University of California, Los Angeles

Albert Satorra Pompeu Fabra University

Sik-Yum Lee Chinese University of Hong Kong

Morton B. Brown University of Michigan–Ann Arbor

Linda L. Demer University of California, Los Angeles

Neil S. Wenger University of California, Los Angeles

Willa A. Hsueh The Ohio State University

Roland R. Roy University of California, Los Angeles

Honghu Liu University of California, Los Angeles

External Links

Personal website of Robert I. Jennrich

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