Greta M. Ljung

Greta Marianne Ljung is a Finnish American statistician. The Ljung–Box test for time series data is named after her and her graduate school advisor, George E. P. Box.[1] She has written textbooks on time series analysis and her work has been published in several top statistical journals, including Biometrika and the Journal of the Royal Statistical Society.

Greta M. Ljung
Alma materÅbo Akademi University
University of Wisconsin–Madison
Known forLjung–Box test
Scientific career
FieldsStatistician
ThesisStudies in the Modeling of Discrete Time Series
Doctoral advisorGeorge E. P. Box

Biography

Ljung received her bachelor's degree in psychology from Åbo Akademi University in Finland.[2] During this time, she developed an interest in psychometrics. After graduation, she studied at the University of Uppsala for eight months under the direction of statistician Herman Wold.[3]

She received her M.S. and Ph.D. in Statistics at the University of Wisconsin–Madison in 1976.[4] Her dissertation was on time series analysis. She held a faculty position at the University of Denver after graduation, where she continued to publish work with her advisor George E. P. Box. In 1978, they published their paper on the Ljung-Box test, which was a modification to the Box-Pierce test.

She taught statistics at the Massachusetts Institute of Technology for over ten years.[2] She has also held a faculty position at Boston University.

She currently resides in Lexington, Massachusetts and works as a statistical consultant.

Works
  • Box, George E. P.; Jenkins, Gwilym M.; Reinsel, Gregory C.; Ljung, Greta M. (2016). Time Series Analysis: Forecasting and Control (5th ed.). New Jersey: Wiley. ISBN 978-1-118-67502-1.

References
  1. G. M. Ljung; G. E. P. Box (1978). "On a Measure of a Lack of Fit in Time Series Models". Biometrika. 65 (2): 297–303. doi:10.1093/biomet/65.2.297.
  2. The Hidden Costs of Coastal Hazards: Implications For Risk Assessment And Mitigation. Island Press. 2000. pp. 202. ISBN 978-1-55963-756-5.
  3. "Time Series Analysis: Forecasting and Control - An interview with co-author Greta M. Ljung on the new edition of the bestseller". Statistics Views. 13 Jul 2015. Retrieved 27 October 2018.
  4. Greta M. Ljung at the Mathematics Genealogy Project
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