# Johannes Ledolter

Johannes Ledolter (August 26, 1950 – November 5, 2023) was an applied statistician. He was a chaired Professor of Business Analytics and of Statistics/Actuarial Science at the University of Iowa as well as Emeritus Professor at the Wirtschafts Universitat in Vienna, Austria. He also served as Associate Investigator, Center for Prevention and Treatment of Visual Loss for the Iowa City VA Health Care System.
Ledolter authored 10 books and more than 150 journal articles and chapters. He was a Fellow of the American Society for Quality and the American Statistical Association. He is also an Elected Member of the International Statistics Institute. He served as Associate Editor of the Journal of Business and Economic Statistics, the Journal of the American Statistical Association, Quality Engineering, and the Journal of Forecasting. A Fulbright Scholarship brought him to America initially. He served as the Program Chair and local organizer of the NBER-NSF seminar on time series in both Iowa City and Vienna. He was the Program Chair of the 1992 Joint Statistical Meetings.

## Education

Ledolter earned a M.S., Statistics, University of Wisconsin-Madison, 1972 He also earned a M.S., Social and Economic Statistics, University of Vienna, 1974 and his Ph.D., Statistics, University of Wisconsin-Madison, 1975.

## Teaching Experience and Honors

Source:
Ledolter taught beginning and advanced courses on statistical methods at the University of Iowa (Tippie College of Business and Department of Statistics/Actuarial Science), Vienna University of Economics and Business, Institute for Advanced Studies (Vienna), Stanford University, University of Chicago Booth School of Business, Yale University, and Princeton University.
Ledolter taught courses on Mathematical Statistics, Linear Models, Regression Analysis, Analysis and Design of Experiments I and II, Multivariate Statistical Techniques, Time Series Analysis I and II, Recent Topics in Time Series Analysis, Forecasting, Probability and Statistics for the Engineering and Physical Sciences, Biostatistics, Business Analytics for MBA, Advanced Business Analytics for MBA, Business Analytics for Executive MBA, Statistical Methods for Quality and Productivity Improvement, Statistical Methods (undergraduate) I and II, Applied Statistical Methods in Forestry and Environmental Studies, introductory and advanced courses on Statistical Methods (in German).

## Consulting

Ledolter presented short courses for business and industry on Statistical Modeling, Time Series Analysis and Forecasting, Statistical Methods for Quality and Productivity Improvement, and Business Analytics and Data Mining.
Ledolter has consulted with US and European companies including Ford Motor Company, Procter and Gamble, Northstar Steel, HON IndustriesMeredith Publishing, Iowa Pork Producers, State of California, Ticona/Celanese, American Express, Bemis Corporation, Lenzing Fiber (Austria), Telekom Austria.,

## Publications

Ledolter, J., Schebeck, F. and Thury, G.: Forecasting Using Leading Indicators: Some Empirical Evidence for Austria, Vandenhoeck and Ruprecht, Göttingen, 1981
Abraham, B. and Ledolter, J.: Statistical Methods for Forecasting, Wiley & Sons, 1983 (Second edition, 2005)
Hogg, R. V. and Ledolter, J.: Engineering Statistics, Macmillan, 1987
Hogg, R. V. and Ledolter, J.: Applied Statistics for Engineers and Physical Scientists, Macmillan, 1992
Ledolter, J. and Burrill, C. W.: Statistical Quality Control: Strategies and Tools for Continual Improvement, Wiley & Sons, 1999
Burrill, C. W. and Ledolter, J.: Achieving Quality Through Continual Improvement, Wiley & Sons, 1999
Abraham, B. and Ledolter, J.: Introduction to Regression Modeling, Duxbury Press, 2006
Ledolter, J. and Swersey, A.J.: Testing 1 – 2 – 3: Experimental Design with Applications in Marketing and Service Operations, Stanford University Press, 2007
Ledolter, J. and Hogg, R. V.: Applied Statistics for Engineers and Physical Scientists, Prentice Hall, 2009
Ledolter, J.: Data Mining and Business Analytics, Wiley & Sons, 2013
Ledolter, J. and VanderVelde, L.S.: Analyzing Textual Information: From Words to Meanings through Numbers, SAGE Publishing (Quantitative Applications in the Social Sciences), 2021.