








P.G.SANKARAN, M.Sc, PhD 

Professor and Pro Vice Chancellor
Department of Statistics
Cochin University of Science and Technology
Cochin 682 022, Kerala, INDIA.
Phone: 914842575893(Office), 914842862477(Direct), 9847348528(Mobile)
Email: pgsankaran@cusat.ac.in, sankaranpg@yahoo.com


Areas of Specialization
Survival Analysis, Reliability Analysis, Distribution Theory


Education
M.Sc (Statistics), Cochin University of Science and Technology, Kerala, India, 1987
PhD, Cochin University of Science and Technology, Kerala, India, 1992

Positions holding 

Head, Department of Statistics, Cochin University of Science and Technology (From 15, December 2014 to 29 August 2017) 

Professor, Department of Statistics, Cochin University of Science and Technology (since 10, November 2010) 

Reader, Department of Statistics, Cochin University of Science and Technology (since 10, November 2004) 

Director, Centre for Population Studies, Cochin University of Science and Technology (since 2002) 
Positions held 

Associate Professor, Department of Statistics, Cochin University of Science and Technology (10 11 2007 to 09112010) 

Reader, Department of Statistics, Cochin University of Science and Technology (between 10112004 to 10112007) 

Lecturer (Senior Scale), Department of Statistics, Cochin University of Science and Technology (between 10111999 to 9112004) 

Lecturer, Department of Statistics, Cochin University of Science and Technology (between 2691997 to 9111999) 

Lecturer in Statistics, Marthoma College for Women, Perumbavoor (between 10111995 to 2591997) 

Statistician, Indian Cardamom Research Institute, Spices Board, Cochin (between 2711993 to 9111995) 
Visits/Fellowships 

SAP DRS Visitor, Calcutta University, Kolkata, February 2010 

Visiting Scientist, Indian Statistical Institute, New Delhi, June 2008 

Visiting Scientist, Indian Statistical Institute, Calcutta, May, 2004 and March 2014 

Visiting Scientist, University of Waterloo, Canada, MayJune 2003 

Post Doctoral Fellow, University of Dalhousie, Canada, AprilAugust, 1997 

BOYSCAST Fellowship of DST, Govt. of India, University of Dalhousie, Canada, MarchSeptember, 2000 

Lecturer, Dalhousie University, Canada, May 2000 

Elected Member of International Statistical Institute, Netherlands 
Memberships of Professional/Academic Bodies 

Member
 Institute of Mathematical Statistics, U.S.A. 

 American Mathematical Society, U.S.A.


 Board of Studies, University of Calicut, Calicut


 Board of Studies in Statistics, CUSAT 

 Board of Studies in Statistics, Kannur University 

 Editorial Board, Journal of Kerala Statistical Association 

Reviewer
 Journal of Statistical Planning and Inference, Netherlands


 Multivariate Analysis


 Computational Statistics and Data Analysis


 Statistics and Probability Letters


 Statistics. 

 Communications in Statistics Theory and Methods


 Statistical Papers


Life member
 International Indian Statistical Association, U.S.A.


 Indian Society for Probability and Statistics, India


 Kerala Statistical Association

Title of the Thesis

Characterization of Pearson family of distributions using Reliability concepts

Publications 

Research papers in refereed journals
 : 136 

Conference papers
 : 61 

Books
 : 03 

Technical reports
 : 03 
Awards and Fellowships 
1 
CSIR Senior Research Fellowship, 19911992 
2 
BOYSCAST Fellow of DST, Govt. of India, 2000 
4 
Young Researcher Award, International Indian Statistical Association, 2010. 
Books 
1 
N. Unnikrishnan Nair and P.G.Sankaran: Statistical Methods for Quality and Reliability, Published by Education Publishers and Distributors, Ernakulam, 1998. 
2 
P.G.Sankaran and S.M.Sunoj: The Collected Papers of Prof. N.Unnikrishnan Nair, Published by Department of Statistics, Cochin, 2007. 
3 
N.Unnikrishnan Nair, P.G.Sankaran and N.Balakrishnan : Quantile based Reliability Analysis, Published by Springer, Birkhauser, New York, 2013. 
Technical Reports 
1 
P.G.Sankaran, S.M.Sunoj and Sreedevi Menon: A General Health Profile of Corporation of Cochin, 2003. 
2 
P.G.Sankaran, S.M.Sunoj and Sreedevi E.P: A Study on Population Changes in Corporation of Cochin, 2005. 
3 
P.G. Sankaran, Dewan, I. and Sreedevi, E.P.: A Class of General Tests for Testing Independence of Failure Time and Cause of Failure in a Competing Risks Model. Technical Report, Indian Statistical Institute, New Delhi, 2009

Academic Activities 
1 
Resource Person for UGC sponsored Refresher course for University/College teachers conducted by Academic Staff College, University of Calicut, 2001. 
2 
Resource Person for UGC sponsored Refresher course for University/College teachers conducted by Department of Statistics, Victoria College, Palakkad, 2001. 
3 
Resource Person for UGC sponsored Refresher course for University/College teachers conducted by Academic Staff College, University of Kerala, Thiruvananthapuram, 2001. 
Conferences/Workshops organized 
1 
Workshop on ISO 2000, 2001, Cochin. 
2 
Workshop on Six Sigma Limits, 2002, Cochin. 
3 
International Conference on Statistics in Industry and Business, 2003, Cochin. 
4 
Workshop on Women and Health Literacy in Kerala, 2006, Cochin. 
5 
IISA Joint Statistical Meeting and International Conference on Statistics, Probability and related areas, 2007, Cochin. 
6 
Workshop on Health and Wellness, 2007, Cochin. 
7 
XXXI Annual Convention of Indian Society for Probability and Statistics (ISPS) and International Conference on Statistics, Probability and Related Areas, December 1922, 2011, Cochin 
8 
International Workshop on Reliability Theory and Survival Analysis, December 31,2013January 2,2014. 

Ph.D. Students guided successfully

Doctoral Thesis Under Supervision

Conferences/Workshops/Refresher Courses participated 
1 
Annual Conference of Indian Society of Agricultural Statistics, Thrissur, February 1994. 
2 
International Symposium on plantation crops, NRCS, Calicut, November 1994. 
3 
Annual Conference of Indian Society for Probability and Statistics, Thirunelveli, December 1994. 
4 
International Conference on ‘Quality Improvement through Statistical Methods’, Cochin University of Science and Technology, December 1996. 
5 
Workshop on QS 9000, Cochin, January 1997. 
6 
UGC Sponsored Refresher Course, Department of Statistics, CUSAT, March, 1997 
7 
National Seminar on ‘Stochastic Systems’, Mangalore University, February 1998. 
8 
National Seminar on ‘Development in Statistical Science’, Bangalore University, August 1998. 
9 
International Conference on ‘Combinatorics, Statistics, Pattern Recognition and Related Areas’, University of Mysore, December 1998. 
10 
International Conference on ‘Stochastic Processes and their Applications’, Cochin University of Science and Technology, December 1999. 
11 
National Conference on ‘Reliability Analysis’, Cochin University of Science and Technology, December 1999. 
12 
National Seminar on ‘Probability Models and Applied Statistics’, University of Calicut, February 2000. 
13 
International Conference on ‘Statistics in 21st Century’, University of Maine, USA, June 2000. 
14 
International Symposium on ‘Development of Statistics in 21st Century’, University of Madras, USA, June 2000. 
15 
BOYSCAST Fellowship of DST, Govt. of India, University of Dalhousie, Canada, MarchSeptember, 2000. 
16 
Workshop on ISO 9000, Third Edition and Cost of Quality, Cochin, January 2001. 
17 
Workshop on Bayesian Inference and its Applications, Indian Statistical Institute, March 2001. 
18 
International Conference on Reliability Analysis, University of Pune, June 2001. 
19 
Annual Conference of ISPS, University of Chandigarh, Chandigarh, December 2001. 
20 
Annual Conference of ISPS, University of Pune, Pune, December 2001. 
21 
International Conference on Statistics in Industry and Business, Cochin, January 2003. 
22 
Annual Conference of ISPS, Nagarjuna University, Guntur, December 2003. 
23 
Annual Conference of ISPS, St.Thomas College, Palai, November 2004 
24 
UGC Sponsored Refresher Course, Department of Statistics, CUSAT, November, 2004 
25 
International Srilankan Conference, University of Perideniya, December 2830, 2004 
26 
International Conference on Reliability, Statistics and Related Areas, Indian Institute of Management, Calicut, January 68, 2005. 
27 
International Conference on Statistical Inference and Stochastic Processes, University of Pune, January 810, 2006. 
28 
International Conference on Reliability, Survival analysis and related areas, ISI, New Delhi, December 2022,2005. 
29 
National Seminar on Modeling and Analysis of Life time Data, Cochin University of Science and Technology, February 2022, 2006. 
30 
IISA Joint Statistical Meeting and International Conference on Statistics, Probability and Related Areas, Cochin, January 25, 2007. 
31 
IISA Workshop on Financial Mathematics, Cochin, January 6, 2007. 
32 
Mathematical Methods in Reliability Conference, Glasgow, U.K., July 14, 2007. 
33 
International Conference on Probability, Statistics, Operations Research, Computer Science and Related areas, IISA & ISPS annual conference, Andhra University, Vysag, January 48, 2010. 
34 
International Conference on Business and Industrial Statistics organized by International Society for Business and Industrial Statistics, Protrose, Slovenia, July 59, 2010 
35 
Workshop on Reliability Theory and Survival Analysis, Indian Institute of Technology, Mumbai, November 2527, 2010

36 
National Seminar on Advances in Statistics, Calcutta University, Kolkata, January 2829, 2011 
37 
National Seminar on Statistics in 21st Century, University of Kerala, Trivandrum, March 1719, 2011 
38 
National Seminar on Stochastic Modelling and Analysis, Cochin University of Science and Technology, Cochin, March 2425, 2011

39 
Workshop on Reliability Theory and Survival Analysis, Indian Statistical Institute, Kolkata, November 2325, 2011 
40 
Annual Convention of ISPS and International Conference on Statistics, Probability and related Areas, Cochin University of Science and Technology, Cochin, December, 1922, 2011 
41 
National Seminar on Recent Developments in Statistics, Pondicherry University, Pondicherry, February 23, 2012 
42 
International Symposium on Business and Industrial Statistics, Chulalongkorn University, Bangkok, June 1721, 2012 
43 
Workshop on Reliability, Survival Analysis and Industrial Statistics, University of Pune, November 910, 2012 
44 
Workshop on Reliability Theory and Survival Analysis, IIT, Kanpur, December 35, 2012 
45 
National Conference on Statistics for 21st Century, University of Kerala, December1012, 2012 
46 
International Conference on Statistics, Science and Society: New Challenges and Opportunities, University of Madras, Chennai, January 25, 2013. 
47 
Attended Workshop on Statistical Analysis of Time Series Data with Applications, CUSAT, January 1416, 2013 
48 
Served as resource person in the Workshop on Random Processes and Applications, College of Engineering, Karunagappally, September 10, 2013 
49 
Served as resource person in the UGC sponsored National Seminar on "Process capability studies with special emphasis on computational techniques and recent trends in Statistics, Nirmala Colloge, Muvattupuzha, 35, October, 2013 
50 
Delivered a talk in International Conference on Role of Statistics in the Advancement of Science and Technology, University of Pune, December 1618, 2013 
51 
Attended international Workshop on Reliability Theory and Survival Analysis, CUSAT, December 31, 2013 January 2, 2014 
52 
Delivered a talk in International Conference on Stochastic Modelling, St.Thomas College, Pala, January 35, 2014 
53 
Delivered a talk on Annual conference of ISPS, S.V. University, Tirupati, November 30 December 2, 2014 
54 
Delivered a talk on National Seminar on Recent Advances in Statistics, University of Pune, January 23, 2015 
55 
Delivered a talk in International Workshop on Reliability and Time Series Methodology Relevant to Business and Industry on "Frailty Models", CUSAT, January 57, 2015 
56 
Delivered a talk on International Conference on New Horizons in Statistical Modeling and Applications, Presidency College, Chennai, 2728, February, 2015 
57 
Delivered a talk on Statistical Inference in the Workshop on Optimizations Techniques at LBS Engineering College, Trivandrum, 2024, July 2015 
58 
Delivered a talk on Survival Analysis in the National seminar at Govt. Victoria College, Palghat, 2324, November 2015 
59 
Delivered a talk on International Workshop on Distribution Theory and Related Areas, Dept. of Statistics, University of Kerala, Trivandrum, 1416, December 2015 
60 
Delivered a talk on International Seminar on Distribution Theory and Related Areas, Dept. of Statistics, University of Kerala, Trivandrum, 1719, December 2015 
61 
Delivered a talk on International Indian Statistical Association Conference, Dept. of Statistics, University of Poona, Pune, 2024, December 2015 
62 
Delivered a talk in the National Seminar, Department of Mathematics, Mercy College, Palakkad, January 29, 2016. 
63 
Delivered a talk on Frailty Models in the Kerala Statistical Association Conference, Nirmala College, Muvattupuzha, February 1213. 2016. 
64 
Resource person for International Workshop on Reliability Theory and Survival Analysis, University of Pune, November 35, 2016 
65 
Delivered a talk in International Symposium on Statistics and Optimization in conjunction with XXXVI Annual Convention of ISPS and Seminar on Statistical Inference, Sampling and Optimization Techniques and Related Areas,Aligarh Muslim University, December, 1719, 2016. 
66 
Delivered a talk in Second International Conference on Statistics for Twentyfirst Century2016, University of Kerala, December, 2123, 2016. 
67 
Delivered a talk on Annual Conference of Kerala Statistical Association, University of Kannur, February 1718, 2017. 
68 
Delivered a talk on National Conference on “Recent Advancements in Statistics and their Applications to Society”, University of Pune, March 2325, 2017. 
69 
Resource person in a one day seminar on “Applied Statistics”, St. Mary’s College , Thrissur, September 26, 2017. 
70 
Resource person in a one day seminar on “Applied Statistical Techniques”, St. Joseph College Irinjalakuda, Thrissur, November 30,2017. 
71 
Resource person on “Reliability” in the Four day Workshop on “Time to Events and Time Series Data Analysis using R”, Department of Statistics, CUSAT, December 1518,2017. 
72 
Delivered a talk on “Quantile Regression Models for the Analysis of middle censored data” in The 2017 IISA International Conference on Statistics, December 2730,2017. 
73 
Delivered a talk on “A Class of Bivariate Weibull Distributions and Its Applications” in International Conference on Theory and Applications of Statistics and Information Sciences (TASIS 2018)ISPS, Bharathiar University, Coimbatore, January 57, 2018. 

List of Research Papers Published

1 
N. Unnikrishnan Nair and P.G.Sankaran: Characterization of the Pearson family of distributions, IEEE Transactions on Reliability, 1991, 22, 7577. ISSN: 00189529, Impact factor:2.57 
2 
P.G.Sankaran and N.Unnikrishnan Nair: Bivariate vitality functions, Proceedings of the Symposium on Distributions Theory, 1991, 6171. 
3 
P.G.Sankaran and N.Unnikrishnan Nair: Characterizations by residual life distributions, Statistics, 1993, 24(3), 245251. ISSN: 1029 4910, 0233 1888 , Impact factor:0.48 
4 
P.G.Sankaran and N.Unnikrishnan Nair: On forminvariant length biased models from Pearson family, Journal of the Indian Statistical Association, 1993, 31(2), 8589. ISSN 05372585 
5 
P.G.Sankaran and N.Unnikrishnan Nair: Some characterizations of the geometric law, Proceedings of the Mahalanobis Birth Centenary Symposium, 1993, 6978. 
6 
P.G.Sankaran and N.Unnikrishnan Nair: Bivariate variance residual life, IAPQR Transactions, 1993, 18(2), 16. ISSN: 09700102 
7 
P.G.Sankaran and N.Unnikrishnan Nair: A bivartiate Pareto model with applications to reliability, Naval Research Logistic Quarterly, 1993, 40, 10131020.  ISSN: 0894069X, 15206750, Impact factor:0.74 
8 
P.G.Sankaran, K.M.Kuruvila and K.J.Madhusoodhanan: Correlation between growth characters in Vanila, Journal of Indian Spices and Aromatic Crops, 1994, 155157. ISSN: 09713328 
9 
P.G.Sankaran, N.Unnikrishnan Nair and N.Hitha: Some characterizations of the Geometic law, Aligarh Journal of Statistics, 1996, 15, 4954. ISSN: 09710388 
10 
P.G.Sankaran and N.Unnikrishnan Nair: On bivariate finite range distributions, Journal of the Indian Statistical Association, 1996, 119124. ISSN: 05372585 
11 
N.Ajithkumar and P.G.Sankaran: Instability of Turmeric Production in India, Journal of Spices and Aromatic Crops, 1998, 1922. ISSN: 09713328 
12 
R.P.Gupta and P.G.Sankaran: Bivariate equilibrium distributions and its applications in reliability, Communications in StatisticsTheory and Methods, 1998, 15, 4959. ISSN: 03610926, Impact factor:0.39 
13 
P.G.Sankaran and R.P.Gupta: Characterization of lifetime distributions using measure of uncertainty, Calcutta Statistical Association Bullettin, 1999, 49, 154166. ISSN: 00080683 
14 
P.G.Sankaran and N.Unnikrishnan Nair: On reliability aspects of Pearson family of distributions, Statistical Papers, 2000, 41, 109117. ISSN: 09325026,Impact factor:0.83 
15 
P.G.Sankaran and N.Unnikrishnan Nair: Conditional mean residual life functions, Communications in StatisticsTheory and Methods, 2000, 29(7), 16631675. ISSN: 03610926, Impact factor:0.39 
16 
P.Priya, P.G.Sankaran and N.Unnikrishnan Nair: Factorial partial moments and their properties, Journal of the Indian Statistical Association, 2000, 38(1), 4556. ISSN: 05372585 
17 
P.G.Sankaran, R.P.Gupta and N.Unnikrishnan Nair: Characterizations using joint distribution of age and residual life in Stationary Renewal process, Far East Journal of Theoretical Statistics, 5(2), 2001, 253264. ISSN: 09720863, Impact factor:0.879 
18 
P.G.Sankaran and T.K.Sindu: On IFR (DFR) classes of distributions, IAPQR Transactions, 26(2), 2001. ISSN: 09700102 
19 
G. Asha and P.G Sankaran: A bivariate geometric distribution with applications in reliability, Journal of Indian Statistical Association, 2002. ISSN: 05372585 
20 
P.G.Sankaran, N. Unnikrishnan Nair and T.K.Sindu:A generalized Pearson system useful in reliability analysis, Statistical Papers, 44, 125130, 2003. ISSN: 09325026,Impact factor:0.83 
21 
G.Asha, P.G.Sankaran and N.UnnikrishnanNair: Probability models with constant total failure rate, Communications in Statistics – Theory and Methods, 32, 10891099, 2003. ISSN: 03610926, Impact factor:0.39 
22 
P. G. Sankaran and S.M.Sunoj:Identification of models using failure rate and mean residual life of doubly truncated random variable, Statistical Papers, 45, 97109, 2004. ISSN: 09325026,Impact factor:0.83 
23 
R.P.Gupta, R.D.Gupta and P.G.Sankaran: Identification of failure rate, Calcutta Statistical Association Bulletin, 53, 209222, 2004. ISSN 00080683 
24 
P.G.Sankaran and R.P.Gupta: Characterizations using local dependence functions, Communications in Statistics –Theory and Methods, Special issue on Characterizations of Probability Distributions, 33, 2004. ISSN: 03610926, Impact factor:0.39 
25 
R.C.Gupta, R.D.Gupta and P.G.Sankaran: Some characterization results based on factorization of the (reversed) hazard rate function, Communications in Statistics – Theory and Methods, Special issue on Characterizations of Probability Distributions, 33, 2004. ISSN: 03610926, Impact factor:0.39 
26 
G.Asha, N.U.Nair and P.G.Sankaran: Discrete models characterized by bivariate conditional mean residual life, Calcutta Statistical Association Bulletin, 55, 241252, 2004. ISSN 00080683 
27 
N.U.Nair, G.Asha and P.G.Sankaran: On the covariance of residual lives, Statistica, 64, 573585, 2004. ISSN: 19732201 
28 
P.G.Sankaran and Maya, T Nair: On a finite mixture of beta distributions, Far East Journal of Theoretical Statistics, 103120, 2004. ISSN: 09720863, Impact factor:0.879 
29 
P.G.Sankaran and N.Unnikrishnan Nair: Partial moments in bivariate set up, Metron, 339351, 2004.ISSN: 00261424 , Impact factor:0.222 
30 
N.U.Nair, P.G.Sankaran and G.Asha: Characterizations based on reliability concepts, Journal of Applied Statistical Science, 14, 237242, 2005.ISSN 10675817 
31 
B.Abraham and P.G.Sankaran: Renyi’s entropy for residual lifetime distributions, Statistical Papers, 1730, 2005. ISSN: 09325026, Impact factor:0.83 
32 
P.G.Sankaran and R.D.Gupta: A general class of distributions properties and applications, Communications in Statistics Theory and Methods, 34, 20892095, 2005. ISSN: 03610926, Impact factor:0.39 
33 
P.G.Sankaran and Maya.T.Nair: On a finite mixture of Pareto distributions, Calcutta Statistical Association Bulletin , 6784, 2005 . ISSN: 00080683 
34 
Ansa Alphonsa Antony and P.G.Sankaran: Non parametric estimation of bivariate survivor function of competing risk models under censoring, Journal of Statistical Theory and Applications, 4, 401423, 2005. ISSN 15387887. 
35 
S.M.Sunoj and P.G.Sankaran: Bivariate weighted distributions in the context of reliability modeling, Calcutta Statistical Association Bulletin, 57, 179194. 2005. ISSN: 00080683 
36 
P.G.Sankaran and Gleeja.V.L: On bivariate reversed hazard rates, Journal of Japan Statistical Association, 36(2), 213224, 2006 . ISSN: 13486365, 18822754. 
37 
P.G.Sankaran, J.F.Lawless, B.Abraham and Ansa A Antony: Nonparametric estimation of distribution functions in bivariate competing risk models, Biometrical Journal, 48(3), 399410, 2006. ISSN: 03233847, 15214036, Impact factor:1.23 
38 
P.G.Sankaran, Bovas Abraham and Ansa Alphonsa Antony: A dependence measure for bivariate failure time data, Metron, 64, 115, 2006. ISSN: 00261424 , Impact factor:0.222 
39 
P.G.Sankaran and Ansa Alphonsa Antony: Bivariate competing risks models under random left truncation and right censoring, Sankhya, Special issue on Biology and Health Sciences, 69, 425447, 2007. ISSN: 09727671, Impact factor:0.27 
40 
P.G.Sankaran and Sreeja, V.N.: Proportional hazards model for multivariate failure time data, Communications in Statistics Theory and Methods, 36(8), 2007 . ISSN: 03610926, Impact factor:0.39 
41 
Sreeja, V.N. and P.G.Sankaran: Proportional mean residual life model for gap time distributions of recurrent events, Metron, LXV(3),319336, 2007. ISSN: 00261424 , Impact factor:0.222 
42 
S.M.Sunoj, P.G.Sankaran and Maya, S.S: Characterizations of distributions using log odds rate, Statistics, 41(5), 443451, 2007. ISSN: 10294910, 02331888 ,Impact factor:0.48 
43 
Bovas Abraham, N.Unnikrishnan Nair and P.G.Sankaran: Characterization of some continuous distributions by properties of partial moments, Journal of Korean Statistical Society, 36, 357365, 2007. ISSN 12263192 , Impact factor:0.44 
44 
P.G.Sankaran, Gleeja.V.L. and T.M.Jacob: Non parametric estimation of reversed hazard rate, Calcutta Statistical Association Bulletin, 59, 5568, 2007. ISSN: 00080683 
45 
S.Smitha, K.R.Muraleedharan Nair and P.G.Sankaran: On measures of affinity for truncated distributions, Calcutta Statistical Association Bulletin, 69, 2346, 2007.
ISSN: 00080683 
46 
P.G.Sankaran and Ansa Alphonsa Antony: Bivariate competing risks models under masked causes of failure, Advances in Mathematical modeling for Reliability (Eds. Bedford, T., Quiglex, J., Walls, L., Alkali, B., Daneshkhah, A. and Aardman, G.), 7279, 2007. ISBN 9781586038656 
47 
N.Unnikrishnan Nair, P.G.Sankaran and Vinesh Kumar B: Total time on test transforms of order n and its implications in reliability analysis, Journal of Applied Probability, 45, 11261139, 2008.ISSN: 0021 9002, Impact factor:0.79 
48 
P.G.Sankaran and Ansa Alphonsa Antony: Nonparametric estimation of bivariate survivor function under masked causes of failure, Journal of Nonparametric Statistics, 20, 7789, 2008. ISSN: 10290311, 10485252, Impact factor:0.48 
49 
P.G.Sankaran and Gleeja V.L: Proportional reversed hazard and frailty models, Metrika, 68, 333342, 2008. ISSN: 00261335, 1435926X, Impact factor:0.55 
50 
N.Unnikrishnan Nair and P.G.Sankaran: Characterizations of multivariate distributions, Journal of Multivariate Analysis, 99, 20962107, 2008. ISSN: 0047259X, 10957243, Impact factor:0.99 
51 
P.G.Sankaran and K.Jayakumar: On proportional odds models, Statistical Papers, 49, 779789, 2008.
ISSN: 09325026,Impact factor:0.83 
52 
P.G.Sankaran and Gleeja V.L: Association of measures for bivariate lifetime data, Communication in StatisticsTheory and Methods, 37, 32283249, 2008. 
53 
P.G.Sankaran and Ansa Alphonsa Antony: Non parametric estimation of life time distribution of competing risk models when censoring times are missing, Statistical Papers, 50, 339361, 2009. ISSN: 09325026,Impact factor:0.83 
54 
P.G.Sankaran and T.K.Sindu: A generalized Ord family of distributions useful in reliability analysis, Journal of Statistical Theory and Applications, Special issue on Characterization and Classification of Distributions, 8, 6174, 2009
. ISSN 15387887. 
55 
N.Unnikrishnan Nair and P.G.Sankaran: Quantile based reliability analysis, Communication in StatisticsTheory and Methods, 99, 20962107, 2009.
ISSN: 03610926, Impact factor:0.39 
56 
P.G.Sankaran and N.Unnikrishnan Nair: Non parametric estimation of hazard quantile function, Journal of Nonparametric Statistics, 21(6), 757 767, 2009. ISSN: 10290311, 10485252, Impact factor:0.48 
57 
S.M.Sunoj, P.G.Sankaran and S.S.Maya: Characterizations of life distributions using conditional expectations of double (interval) truncated random variables, Communication in StatisticsTheory and Methods, 38, 14411452, 2009. ISSN: 03610926, Impact factor:0.39 
58 
K.R.Muraleedharan Nair , P.G.Sankaran and Smitha.S: Chernoff distance for truncated distributions, Statistical Papers, 2010(DOI 10.1007/s0036200902976)
. ISSN: 09325026,Impact factor:0.83 
59 
P.G.Sankaran, N.Unnikrishnan Nair and E.P.Sreedevi: A quantile based test for comparing cumulative incidence functions of competing risks models, Statistics and Probability Letters, 80, 886891, 2010
.ISSN 01677152 , Impact factor:0.58 
60 
N.Unnikriahnan Nair and P.G.Sankaran: Properties of a mean residual life function arising from renewal theory, Naval Research Logistics Quarterly, 57, 373379, 2010
.
ISSN: 0894069X, 15206750, Impact factor:0.74 
61 
N.Unnirkishnan Nair and P.G.Sankaran: A new measure of association for bivariate survival data, Journal of Statistical Planning and Inference, 140, 25692581, 2010
.
ISSN: 03783758 , Impact factor:0.66 
62 
P.G.Sankaran and Midhu N.N: On waiting time distributions for patterns in a sequence of multistate trials, Statistics and Probability Letters, 80, 17981805, 2010.
ISSN 01677152 , Impact factor:0.58 
63 
P.G.Sankaran and Preetha Kumari P.V:. A parametric regression model useful in reliability analysis, Bulletin of Calcutta Statistical Association,183206, 2010
. ISSN: 00080683 
64 
P.G.Sankaran, Ashis SenGupta and Sreeja V.N.: Nonparametric estimation of distribution function using concomitants of order statistics. Journal of Statistical Theory and Practice, 4(4), 617630, 2010 .ISSN: 15598608, 15598616, Impact factor:0.32 
65 
P.G.Sankaran and Sreeja V.N.: Proportional Hazards Model for Gap Time Distributions of Recurrent Events, Special issue on Survival Analysis, Journal of Statistical Theory and Applications, 5971, 2011. ISSN 15387887. 
66 
N.Unnikrishnan Nair, P.G.sankaran and Vineesh Kumar B.: Modelling lifetimes by quantile functions using Parzen’s score function, Statistics, 2011
 ISSN: 10294910, 02331888 ,Impact factor:0.48 
67 
P.G.Sankaran and Anisha P.: Shared frailty model for recurrent event data with multiple causes, Journal of Applied Statistics, 38, 2559 2568, 2011
.ISSN: 02664763, 13600532, Impact factor:0.54 
68 
P.G.Sankaran and Gleeja V.L.: On proportional reversed hazards frailty models, Metron , LXIX, 151173, 2011.
ISSN: 00261424 , Impact factor:0.222 
69 
N.Unnikrishnan Nair and P.G.Sankaran: Quantile based lower partial moments and their applications, American Journal of Mathematical and Management Sciences, 255276, 2011. ISSN 01966324 , 23258454 ,Imapct factor:0.31 
70 
E.P.Sreedevi and P.G.Sankaran: A semiparametric Bayesian approach for the analysis of competing risks data, Communications in StatisticsTheory and Methods, 41, 28032818, 2012
. ISSN: 03610926, Impact factor:0.39 
71 
P.G.Sankaran and Sreeja V.N.: Proportional Hazards Model for Successive Duration Times Under Informative Censoring, Communications in Statistics Theory and Methods,41, 262280, 2012. ISSN: 03610926, Impact factor:0.39 
72 
N.Unnirkishnan Nair and P.G.Sankaran.: Some results on an additive hazards model, Metrika, 75, 389–402, 2012. ISSN: 00261335, 1435926X, Impact factor:0.55 
73 
N.Unnikrishnan Nair, P.G.Sankaran and B. Vineesh Kumar: Govindarajalu distribution and its properties, Communications in Statistics Theory & Methods, , 41, 43914406, 2012. ISSN: 03610926, Impact factor:0.39 
74 
N.Unnikrishnan Nair, P.G.Sankaran and M.Preeth: Reliability Aspects of Discrete Equilibrium Distributions, Communications in Statistics Theory and Methods, 41, 500515, 2012
. ISSN: 03610926, Impact factor:0.39 
75 
P.G.Sankaran, M.Manoharan and Anisha P: Nonparametric estimators of survivor function of paired recurrent events, Statistical Methodology, 9, 501512, 2012 .ISSN: 15723127, Impact factor:0.91

76 
Sankaran, P. G. andAnisha, P: Additive hazards models for gap time data with multiple causes. Statistics & Probability Letters, 82(7), 14541462, 2012. 
77 
S.M.Sunoj and P.G.Sankaran: Quantile residual entropy function, Statistics and Probability Letters, 82, 1491053, 2012
.ISSN 01677152 , Impact factor:0.58 
78 
Sreedevi E.P., P.G.Sankaran and P.Dhanavandhan: A nonparametric test for independence of time to failure and cause of failure of current status competing risks data, Bulletin of Calcutta Statistical Association, 167180, 2012 .
ISSN: 00080683 
89 
N.Unnikrishnan Nair and P.G.Sankaran: Characterization of Distributions by Properties of Truncated Gini Index and Mean Difference, Metron, LXX  N. 23 , 173191, 2012
.ISSN: 00261424 , Impact factor:0.222 
80 
N.Unnikrishnan Nair and P.G.Sankaran : Some new applications of the total time on test transforms. Statistical Methodology, 10, 93102,2013.
ISSN: 15723127, Impact factor:0.91

81 
P.G.Sankaran and Debasis Kundu: A bivariate Pareto model, Statistics, 48(2), 241255, 2014.

82 
N.Unnikrishnan Nair, P.G.Sankaran and S.M.Sunoj : Quantile based stoploss transform and its applications, Statistical Methods and Applications, 22, 167182, 2013.ISSN 16182510 , Impact factor:
0.351 
83 
P.G.Sankaran,Isha Dewan and Anisha P: On testing independence of failure time and cause of failure using subquantiles, Journal of Statistical Theory and Practice, 7, 2432, 2013. ISSN: 15598608, 15598616, Impact factor:0.32 
84 
S.M.Sunoj, P.G.Sankaran and Asok Nanda: Quantile based entropy function in past lifetime, Statistics and Probability Letters, 83, 366372, 2013
.ISSN 01677152 , Impact factor:0.58 
85 
N.Unnikrishnan Nair, P.G.Sankaran and S.M.Sunoj: Quantile based reliability aspects of partial moments, Journal of Korean Statistical Society, 42, 329342. 2013.
ISSN 12263192 , Impact factor:0.44 
86 
E.P.Sreedevi and P.G.Sankaran: Analysis of Competing Risks Data Using Neural Network Models, International Journal of Statistics and Applications, 3(4), 123131.
ISSN: 21685193, 21685215 
87 
N.Unnikrishnan Nair and P.G.Sankaran: Characterizations of discrete distributions by reliability concepts in reversed time, Statistics and Probability Letters, 19391945, 2013.
ISSN 01677152 , Impact factor:0.58

88 
Midhu N. P.G.Sankaran and N.Unnikrishnan Nair: A class of distributions with linear mean residual quantile function and it's generalizations., Statistical Methodology, 2013 ,15,124, ISSN: 15723127, Impact factor:0.91

89 
N. Unnikrishnan Nair and P.G.Sankaran: A family of bivariate exponential distributions and their copulas, Sankhya B, 2013 DOI 10.1007/s1357101300672
.ISSN: 09727671, Impact factor:0.27 
90 
N.Midhu, P.G.Sankaran and N.Unnikrishnan Nair: A class of distributions with linear hazard quantile function, Communications in Statistics Theory & Methods,43,3674–3689,2014(DOI: 10.1080/03610926.2012. 705211)
. ISSN: 03610926, Impact factor:0.39 
91 
N.Unnikrishnan Nair and P.G.Sankaran: Characterizations and timedependent association measures for bivariate schurconstant distributions, Brazilian Journal of Probability and Statistics, 8 (3), 409423, 2014.
ISSN: 01030752, Impact factor:0.45 
92 
Sreedevi. E.P., P.G.Sankaran and P.Dhanavanthan: A nonparametric test for comparing cumulative incidence functions of current status competing risks data, Journal of Statistical Theory and Practice, 8, 743759, 2014. ISSN: 15598608, 15598616, Impact factor:0.32

93 
Asok K Nanda, P.G.Sankaran and S.M.Sunoj: Renyi's residual entropy: A quantile approach, Statistics and Probability Letters, 114121, 2014.

94 
Asokan Mulayathvariyath and P.G.Sankaran : Parametric regression models using reversed hazard rates, Journal of Probability and Statistics , 2014, http://dx.doi.org/10.1155/2014/645719.
ISSN: 01030752, Impact factor:0.45 
95 
Midhu N , P.G.Sankaran and N. Unnikrishnan Nair: A new quantile function with applications to reliability analysis, Communications in Statistics Simulation and Computation,117, 2015 .
ISSN: 15324141, 03610918, Impact factor:0.879 
96 
P.G.Sankaran and Prasad S : Weibull regression model for analysis of middle censored lifetime data, Journal of Statistics & Management Systems., 17(56), 433443, 2014. ISSN:09720510 , 21690014 . 
97 
P.G.Sankaran and Midhu N: A class of distributions defined by quantile density function, Bulletin of Calcutta Statistical Association, 2015 ( to appear).
ISSN: 00080683 
98 
P.G.Sankaran and Sreedevi E.P. : A proportional hazards model for the analysis of doubly censored competing risks data, Communications in Statistics Theory and Methods, 2015 ( to appear).
ISSN: 03610926, Impact factor:0.39 
99 
Bijamma Thomas, Midhu N. and P.G.Sankaran: A software reliability model using quantile function, Journal of Probability and Statistics, 2014.
ISSN: 01030752, Impact factor:0.45 
100 
Bijamma Thomas, Midhu N. and P.G.Sankaran: On bilinear hazard quantile functions, Metron, 73(1), 135148, 2015. 
101 
N.Unnikrishnan Nair and P.G.Sankaran: Modelling lifetimes with bivariate Schurconstant equilibrium distributions from renewal theory, Metron, 72(3), 331349, 2014
.ISSN: 00261424 , Impact factor:0.222 
102 
Sankaran, P.G., and Anjana S.: Modeling lifetime data with multiple causes using cause specific reversed hazard rates, Statistica 74, no. 3 (2014): 315. 
103 
P.G.Sankaran, N. Unnikrishnan Nair and Preethi John: A family of bivariate Pareto distributions, Statistica, 74(2), 199, 2014. ISSN: 19732201 
104 
P.G.Sankaran. Asokan Mulayathvariyath and Anjana S: Additive reversed hazards models, American Journal of Mathematical and Management Sciences, 33(4), 315329, 2014 .ISSN 01966324 , 23258454 ,Imapct factor:0.31

105 
Vineeshkumar B, N.Unnikrishnan Nair and P.G.Sankaran: Stochastic orders using quantilebased reliability functions, Journal of Korean Statistical Society, 44(2), 221231, 2015. ISSN 12263192 , Impact factor:0.44

106 
David Hanagal, Aravind Pandey and P.G.Sankaran: Shared Frailty Model Based on Reversed Hazard Rate for Left Censored Data, Communications in Statistics Simulation and Computation, 2015 ( to appear).
ISSN: 15324141, 03610918, Impact factor:0.879 
107 
N.Unnikrishnan Nair and P.G.Sankaran: Odds functions and odds rates for discrete life distributions: Communications in Statistics Theory and Methods, 44, 41854202, 2015
. ISSN: 03610926, Impact factor:0.39 
108 
P.G.Sankaran, Isha Dewan and Sreedevi E.P.: A nonparametric test for stochastic dominance using total time on test transform, American Journal of Mathematical and Management Sciences, , 34 (2), 162183, 2015
. ISSN 01966324 , 23258454 ,Imapct factor:0.31 
109 
N.N.Midhu and P.G.Sankaran: Testing exponentiality using mean residual quantile function, Statistical Papers, 113, 2015. ISSN: 09325026,Impact factor:0.83 
110 
Bijamma Thomas, N.N. Midhu and P.G.Sankaran: A software reliability model using mean residual quantile function, Journal of Applied Statistics, 42(7), 14421457, 2015
.ISSN: 02664763, 13600532, Impact factor:0.54
.

111 
P.G.Sankaran and S.M. Sunoj; Quantile Based Cumulative Entropy, Communications in Statistics Theory and Methods, 2015 (to appear).
ISSN: 03610926, Impact factor:0.39 
112 
N.Unnikrishnan Nair and P.G.Sankaran: Multivariate discrete scalar hazard rate, Statistical Methodology, 27, 3950, 2015. ISSN: 15723127, Impact factor:0.91 
113 
P.G.Sankaran and Anjana S: Proportional cause specific reversed hazards model, Journal of Nonparametric Statistics,116, 2015. ISSN: 10290311, 10485252, Impact factor:0.48 
114 
P.G.Sankaran, Preethi John and N.Unnikrishnan Nair: Characterizations of bivariate Pareto distributions, Statistica, LXXV(3), 275290, 2015. ISSN 19732201 
115 
Anup Dewanji, P.G.Sankaran, Debasis Sengupta and Bappa Karmakar: Regression Analysis of Competing Risks Data with General Missing Pattern in Failure Types, Statistical Methodology, 29, 1831, 2016. ISSN: 15723127, Impact factor:0.91 
116 
P.G.Sankaran and Anjana S: Parametric analysis of failure time data with multiple causes using cause specific reversed hazard rates, Bulletin of Calcutta Statistical Association,67,267268, 2015. ISSN: 00080683 
117 
P.G.Sankaran, S.M.Sunoj and N.Unnikrishnan Nair: KullbackLeibler Divergence: A Quantile Approach, Statistics and Probability Letters, 111, 7279, 2016,
ISSN: 01677152 , Impact factor:0.58 
118 
Sankaran, P. G., and E. P. Sreedevi: A proportional hazards model for the analysis of doubly censored competing risks data, Communications in StatisticsTheory and Methods 45, no. 10 (2016): 29752987. 
119 
Sankaran P. G., Ramesh Nidhi P., Unnikrishnan Nair N.: Ageing Classes in Discrete Time Based on Hazard Rate: A Review and New Results. Research & Reviews: Journal of Statistics. 2016; 5(1): 10–26p. 
120 
P.G.Sankaran and Anjana S : Nonparametric Estimation of Cumulative cause Specific Reversed Hazard Rates under Masked Causes of Failure, Journal of Biostatistics and Biometric Applications, 2016( to appear). 
121 
N. Unnikrishnan Nair, P. G. Sankaran and Nidhi P. Ramesh : Some properties of discrete bathtubshaped distributions, Communications in Statistics  Theory and Methods 2016 (to appear), DOI: 10.1080/03610926.2015.1100743 
122 
N. Unnikrishnan Nair, P. G. Sankaran, and Nidhi P. Ramesh:Determination of hazard rate shape for discrete lives, International Journal of Reliability, Quality and Safety Engineering, 2016 (to appear), DOI: http://dx.doi.org/10.1142/S0218539316500157 
123 
Prasad S., Sankaran P. G.: Semiparametric regression model for analysis of middle censored lifetime data, Statistica, 2016. 
124 
Sankaran P. G., N. Unnikrishnan Nair, and N. N. Midhu.: A new quantile function with applications to reliability analysis., Communications in StatisticsSimulation and Computation 45.2, 2016: 566582. 
125 
Sankaran P. G., N. Unnikrishnan Nair, and Nidhi P. Ramesh.: Quantification of relative ageing in discrete time., Metron , 2016: 339355. 
126 
Jammalamadaka, S. Rao, Sundaresan Nair Prasad, and Paduthol Godan Sankaran.: A semiparametric regression model for analysis of middle censored lifetime data., Statistica 76.1 , 2016: 27. 
127 
Sankaran, P. G., Nidhi P. Ramesh, and N. Unnikrishnan Nair.: Multivariate discrete reversed hazard rates., Communications in StatisticsTheory and Methods , 46 (19), 98179833, 2017. 
128 
Sankaran P G and Preethi John .: A positive dependent Archimedean copula., Journal of Applied Mathematics and Statistics, 2017. 
129 
Sankaran, P. G., Isha Dewan, and E. P. Sreedevi .: A martingalebased test for independence of time to failure and cause of failure for competing risks models., Communications in StatisticsTheory and Methods 46.16 , 2017:81788186. 
129 
Sankaran, P. G., and N. N. Midhu.: Nonparametric estimation of mean residual quantile function under right censoring., Journal of Applied Statistics , 44.10, 2017: 18561874. 
130 
Sankaran, P. G., Nidhi P. Ramesh, and N. Unnikrishnan Nair.: Discrete distributions with bathtubshaped hazard rates., South African Statistical Journal , 51.1 (2017): 81102. 
131 
Preethi John and P. G. Sankaran.: A Bivariate Weibull Family with Applications., American Journal of Mathematical and Management Sciences , 36.2 (2017): 162175.. 
132 
Sreedevi E.P., P.G.Sankaran and Isha Dewan.: : A semiparametric regression model for current status competing risks data., Journal of Indian Statistical Association , 2017 
133 
Sunoj, S. M., Aswathy S. Krishnan, and P. G. Sankaran.: QuantileBased Entropy of Order Statistics., Journal of the Indian Society for Probability and Statistics , 18.1 (2017): 117. 
134 
Sankaran, P. G..: Discrete ., South African Statistical Journal , 51.1 (2017): 81102. 
135 
Sankaran, P. G., and Preetha Kumari. P V.: Proportional Reversed Hazards Rates Model with Quantile Regression., Journal of the Indian Society for Probability and Statistics. , 18.2 (2017): 225236. 
136 
Sankaran, P. G., and S. Prasad.: An additive risks regression model for middlecensored lifetime data., Statistics in Transition , 18 (3) (2017). 

Courses Taught

Mathematical Methods for Statistics 
Multivariate Methods 
Probability distributions 
Actuarial Statistics 
Sampling Theory and Methods 
Design and Analysis of Experiments 
Theory of Estimation 
Reliability and Life Testing 
Testing of Hypothesis 
Forecasting and Decision 
Reliability Modelling and Analysis 
Practicals 
Survival Analysis 



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Paduthol Mana
Panagarappilly PO
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