# Pranab K. Sen

**Pranab Kumar Sen** (born 7 November 1937 in Calcutta, India)^{[1]} is a statistician, a professor of statistics and the Cary C. Boshamer Professor of Biostatistics at the University of North Carolina at Chapel Hill.^{[2]}

Pranab Kumar Sen | |
---|---|

Born | |

Residence | Chapel Hill, NC |

Citizenship | United States |

Alma mater | University of Calcutta |

Scientific career | |

Fields | Statistician |

Institutions | University of North Carolina at Chapel Hill |

Doctoral students | Malay Ghosh |

## Academic biographyEdit

Sen was the second of seven siblings; his father, a railway officer, died of leukemia when Sen was ten, and he was raised by his mother, the daughter of a physician.^{[3]}
He began his undergraduate studies at Presidency College, Kolkata, initially intending to study medicine but shifting to statistics when it was discovered that he was too young for medical college.^{[3]} He received a B.S. from the University of Calcutta in 1955, an M.Sc. in 1957, and a Ph.D. in 1962;^{[1]}^{[2]}^{[4]} his doctoral advisor was Hari Kinkar Nandi.^{[3]} He taught for three years at the University of Calcutta and one more year at the University of California, Berkeley before joining the UNC faculty in 1965; although he has held visiting positions at other universities, he has remained at Chapel Hill for the rest of his career.^{[1]}^{[2]} He was the founding co-editor of two journals, *Sequential Analysis* and *Statistics and Decisions*,^{[3]} and was joint editor-in-chief of the *Journal of Statistical Planning and Inference* from 1980 to 1983.^{[1]}

## Research and graduate advisingEdit

Sen is the author or co-author of multiple books on non-parametric statistics, the advisor of over 80 Ph.D. students, and the author of over 600 research publications.^{[1]}^{[5]} He is known for inventing the Hodges–Lehmann estimator independently of and contemporaneously with Hodges and Lehmann^{[3]}^{[6]} and for the Theil–Sen estimator, a form of robust regression that fits a line to two-dimensional sample points by choosing the slope of the fit line to be the median of the slopes of the lines through pairs of samples.^{[7]}^{[8]}

## Awards and honorsEdit

Sen is a fellow of the Institute of Mathematical Statistics^{[9]} and of the American Statistical Association.^{[10]} He became the Cary C. Boshamer Professor in 1982.^{[1]} He was the Lukacs Distinguished Visiting Professor at Bowling Green State University in 1996–1997.^{[11]} In 2002 he won the Gottfried E. Noether Senior Scholar Award of the American Statistical Association,^{[12]} and he was the 2010 winner of the Wilks Memorial Award of the ASA "for outstanding contributions to statistical research, especially in nonparametric statistics and biostatistics; and for exceptional service in mentoring doctoral students."^{[13]} The Government of India awarded him the civilian honour of Padma Shri in 2011.^{[14]} In 2012, the University of Calcutta awarded him an honorary Doctor of Science degree.^{[15]}

In 2007, a festschrift was dedicated to him on the occasion of his 70th birthday.^{[3]}^{[5]}

## ReferencesEdit

- ^
^{a}^{b}^{c}^{d}^{e}^{f}Curriculum vitae Archived 20 July 2011 at the Wayback Machine, retrieved 2011-07-03. - ^
^{a}^{b}^{c}Faculty profile, UNC Chapel Hill, retrieved 2011-07-03. - ^
^{a}^{b}^{c}^{d}^{e}^{f}Ghosh, Malay; Schell, Michael J. (2008), "A Conversation with Pranab Kumar Sen",*Statistical Science*,**23**(4): 548–564, arXiv:0906.4165, doi:10.1214/08-STS255. **^**Pranab Kumar Sen at the Mathematics Genealogy Project.- ^
^{a}^{b}Balakrishnan, N.; Pena, E.; Silvapulle, M. J. (2008), "Pranab Kumar Sen: Life and Works",*Beyond Parametrics in Interdisciplinary Research: Festschrift in Honor of Professor Pranab K. Sen*, IMS, pp. 1–16, arXiv:0805.2229, doi:10.1214/193940307000000013. **^**Lehmann, Erich L. (2006).*Nonparametrics: Statistical methods based on ranks*(Reprinting of 1988 revision of 1975 Holden-Day ed.). New York: Springer. pp. 176 and , 200–201. ISBN 978-0-387-35212-1. MR 0395032.**^**Rousseeuw, Peter J.; Leroy, Annick M. (2003),*Robust Regression and Outlier Detection*, Wiley Series in Probability and Mathematical Statistics,**516**, Wiley, p. 67, ISBN 978-0-471-48855-2.**^**Wilcox, Rand R. (2001), "Theil–Sen estimator",*Fundamentals of Modern Statistical Methods: Substantially Improving Power and Accuracy*, Springer-Verlag, pp. 207–210, ISBN 978-0-387-95157-7.**^**IMS Fellows, retrieved 2011-07-03.**^**ASA Fellows, retrieved 2011-07-03.**^**Bowling Green State University: Eugene Lukacs Professors Archived 12 August 2011 at the Wayback Machine, retrieved 2011-07-03.**^**Gottfried E. Noether Awards, retrieved 2011-07-03.**^**Samuel S. Wilks Award, retrieved 2011-07-03.**^**"Padma Awards" (PDF). Ministry of Home Affairs, Government of India. 2015. Retrieved 21 July 2015.**^**"Annual Convocation". University of Calcutta. Archived from the original on 28 May 2012.