Economou Polychronis
Assistant Professor of Statistics

Book

P. Economou
and C. Caroni. Regression Models. Simeon, Athens, 2nd Edition, 2017 (In Greek).


Scientific editing/translation in Greek

D.C. Montgomery and  R. C. George. Applied Statistics and Probability for Engineers, 6th Edition, Tziolas Eds. (In Greek)


Papers

31. P. Economou, A .Batsidis, G. Tzavelas. Robust inference under r-size biased sampling without replacement from finite population, Journal of Applied Statistics, To appear.

30. P. Economou, A. Batsidis, G. Tzavelas, P. Alexopoulos
and ADNI. Berkson's paradox and weighted distributions: An application to Alzheimer's disease, Biometrical Journal, 1-12, 2019, https://doi.org/10.1002/bimj.201900046

29.  E.S. Bekri, P.C. Yannopoulos and P. Economou. Methodology for improving reliability of river discharge measurements.  Journal of Environmental Management, 247, 371-384,2019.

28. P. Alexopoulos, N. Thierjung, P. Economou, L. Benedikt Werle, F. Buhl, S.M. Kagerbauer, A.D. Papanastasiou, T. Grimmer, P. Gourzis, et al. Plasma Levels of Soluble AβPPβ as a Biomarker for Alzheimer's Disease with Dementia. Journal of Alzheimer's disease. 69 (1), 83-90, 2019.

27. P. Alexopoulos, N. Thierjung, T. Grimmer, M. Ortner, P. Economou, K. Assimakopoulos, P. Gourzis, A. Politis, R. Perneczky and The Alzheimer's Disease Neuroimaging Initiative. Cerebrospinal Fluid BACE1 Activity and sAβPPβ as Biomarker Candidates of Alzheimer Disease, Dementia and Geriatric Cognitive Disorders. 45, 152-161, 2018.

26. M. Stehlik, P.Economou, L. Papic, J. Aronov, O. Nicolis, J. Antοch, E. Cezova and J. Kiselak. Statistical testing of availability for mining technological systems with air quality constraints, Applied Stochastic Models in Business and Industry. 34, 278-292, 2018.

25. G. Tzavellas and P. Economou. On the consequences of model misspecification for biased samples from the Weibull Distribution. In "Risk Assessment Challenges: Theory and Practice", by Springer Proceedings in Mathematics and Statistics, 357-369, 2017.

24. V. Karioti and P. Economou. Detection of Outlier in Time Series Count Data. In "Advances in Time Series Analysis and Forecasting", Eds. I. Rojas, Ignacio, H. Pomares and O. Valenzuela. 1, 209-221, Springer, Cham, 2017.

23. S. Bersimis and P. Economou. The use of length biased distribution in statistical monitoring, Australian & New Zealand Journal of Statistics, 59(2), 155-167, 2017.

22. G. Psarrakos and P. Economou. On the generalized cumulative residual entropy weighted distributions.Communications in Statistics - Theory and Methods, 46(22), 10914-10925, 2017.

21. G. Tzavelas, M. Douli and P. Economou. Model misspecification effects for biased samples, Metrika, 80(2), 171-185, 2017.

20. A. Batsidis, P. Economou and G. Tzavelas. Tests of fit for a lognormal distribution. Journal of Statistical Computation and Simulation, 86(2), 215-235, 2016.

19. S. Malefaki, P. Economou and C. Caroni. Modelling times between events with a cured fraction using a first hitting time regression model with individual random effects. In "Risk Assessment Challenges: Theory and Practice", by Springer Proceedings in Mathematics and Statistics, 136, 45-65, 2015.

18. P. Economou, S. Malefaki and C. Caroni. Bayesian threshold regression model with random effects for recurrent events. Methodology and Computing in Applied Probability. 17(4), 871-898, 2015.

17. G. Tzavelas and P. Economou. Extreme value distributions for biased samples. Probability in the Engineering and Informational Sciences, 29 (02), 277-290, 2015.

16. P. Economou and M. Stehlik. On small samples testing for frailty through homogeneity test, Communications in Statistics - Simulation and Computation, 44(1), 20-65, 2014.

15. P. Economou and G. Tzavelas. Kullback-Leibler divergence measures based tests concerning the biasness in a sample. Statistical Methodology. 24, 88-108, 2014.

14. M. Stehlik, P. Economou, J, Kiselak and W.D. Richter. Kullback-Leibler life time testing. Applied Mathematics and Computation. 240, 122-139, 2014.

13. D. Panagoulia, P. Economou, C. Caroni. Stationary and non-stationary GEV modelling of extreme precipitation over a mountainous area under climate change. Environmetrics. 25(1), 29-43, 2014.

12. G. Tzavelas and P. Economou. Characterization properties based on the Fisher information for weighted distributions. Statistics and Probability Letters. 84, 54-59, 2014.

11. C. Caroni and P. Economou. A Hidden Competing Risk Model for Censored Observations. Brazilian Journal of Probability and Statistics. 28(3), 333-352, 2014.

10. P. Economou. Modelling Survival Data Using Mixtures of Frailties. Statistics. 47(2), 453-464, 2013.

9. P. Economou and G. Tzavelas. Sample Tests for Detection Of Size-Biased Sampling Mechanism. Communications in Statistics - Theory and Method. 42(18), 3280-3295, 2013.

8. G. Tzavelas and P. Economou. Characterization Properties of the Lognormal Distribution with the Help of Divergence Measures. Statistics and Probability Letters. 82, 1837-1840, 2012.

7. P. Economou. On Model Selection in the Case of Nested Distributions - An Application to Frailty Models. Statistical Methodology. 8, 172-184, 2011.

6. M. Saleem, M. Aslam and P. Economou. On the Bayesian Analysis of the Mixture of Power Function Distribution Using the Complete and the Censored Sample. Journal of Applied Statistics. 37, 25 - 40, 2010.

5. P. Economou and C. Caroni. Fitting Parametric Frailty and Mixture Models Under Biased Sampling. Journal of Applied Statistics. 36, 53-66, 2009.

4. P. Economou and C. Caroni. Closure Properties and Diagnostic Plots for the Frailty Distribution in Proportional Hazards Models. In "Statistical Models and Methods for Biomedical and Technical Systems", pp. 43-54, Birkhauser, 2008.

3. P. Economou and C. Caroni. Graphical Tests for the Frailty Distribution in the Shared Frailty Model, Communications in Statistics-Simulation and Computation. 37, 978-992, 2008.

2. P. Economou and C. Caroni. Parametric Proportional Odds Frailty Models, Communications in Statistics-Simulation and Computation. 36, 1295-1307, 2007.

1. P. Economou and C. Caroni. Graphical Tests for the Assumption of Gamma and Inverse Gaussian Frailty Distributions, Lifetime Data Analysis, 11, 565-582, 2005.


Publications - Proceedings

4. C. Caroni and P. Economou. Estimating parametric continuous frailty models and mixture models from biased samples of lifetime data. In Proceedings of the Fifth International Mathematical Methods in Reliability (MMR), Glasgow, Scotland, 2007

3. P. Economou and C. Caroni. Parametric failure and mixture models for lifetime data under biased sampling. In Proceedings of the XIIΙth International Symposium on Applied Stochastic Models and Data Analysis, Chania, Greece, 2007

2. P. Economou and C. Caroni. Diagnostic Plots for the Frailty Distribution in Proportional Hazards Models. In Proceedings of the International Conference Biostat 2006 - Statistical Methods for Biomedical and Technical Systems, University of Cyprus; Nicosia, 73-78, 2006

1. P. Economou and C. Caroni. Diagnostic Tests for Frailty. In Proceedings of the XIIth International Symposium on Applied Stochastic Models and Data Analysis, ENST Bretagne; Brest, France, 1201-1209, 2005


International Conferences - Paper presentation

European Meeting of Statisticians (EMS)
Palermo, Italy, July 22nd -26th, 2019
Title: Berkson's Paradox and Weighted Distributions: An application to Alzheimer's Disease (Presented by my co-author A. Batsidis)


10th International Workshop on Simulation and Statistics
Salzburg , Austria, September 2nd- 6th, 2019
Title: Berkson's Paradox, What Next? Extracting Information for the Entire Population: An Application to Alzheimer's Disease


5th Meeting on Statistics
Aegina, Greece, September 6th-8th, 2019
Title: The Metafrontier Production Function from a Bayesian perspective: A cross-country comparison  (Presented by my co-author S. Malefaki)


International Symposium on Business and Industrial Statistics 2018

Piraeus, Greece, July 4th -6th  2018
Title: Simultaneous Monitoring the Number and the Spatial Distribution of Disease Events


International Symposium on Business and Industrial Statistics 2018
Piraeus, Greece, July 4th -6th  2018
Title: Public Health Monitoring Using Scans and Control Charts (Presented by my co-author S. Bersimis)


9th International Workshop On Applied Probability (IWAP 2018)
Budapest, Hungary, June 18th -21st  2018
Title: A New Procedure for Public Health Monitoring (Presented by my co-author S. Bersimis)

Stochastic Modeling Techniques and Data Analysis International Conference with Demographics Workshop (SMTDA2018)
Chania, Greece, June 12th -15th  2018
Title: Monitoring the Number and the Spatial Distribution of Disease Events Using Convex Hulls and Control Charting


Stochastic Modeling Techniques and Data Analysis International Conference with Demographics Workshop (SMTDA2018)
Chania, Greece, June 12th -15th  2018
Title: A New Technique for Monitoring Public Health Combining Scan Statistics and Control Charts (Presented by my co-author S. Bersimis)

Stochastic Modeling Techniques and Data Analysis International Conference with Demographics Workshop (SMTDA2018)
Chania, Greece, June 12th -15th  2018

Title: Statistical inference based on r-size biased sample with an application to statistical process monitoring (Presented by my co-author G. Tzavelas)

American Academy of Ophthalmology (AAO) 2017 Annual Meeting.
New Orleans, Louisiana, USA, November 11th - 14th, 2017.
Title: A Model to Assess the Risk of Chemotherapy and Time to Treatment in Children with Optic Pathway Gliomas (Presented by my co-author E. Drimtzias)

Sixth International Conference on Environmental Management, Engineering, Planning and Economics (CEMEPE) and SECOTOX Conference
Thessaloniki, Greece, July 26th-30th, 2017
Title: Correction technique of quick river discharge estimates based on water volume and mass pollutant balances: Nonlinear model (Presented by my co-author E. Bekri)

17th conference of ASMDA international society
London, UK, June 6th - 9th, 2017
Title: Modelling a dynamic size biased sampling

9th EMR-IBS and Italian Region conference
Thessaloniki, Greece, May  8th-12th 2017
Title: A new biosurveillance method based on convex hull (presented by my co-author A. Sachlas)

9th International Conference of the ERCIM WG on Computational and Methodological Statistics (CMStatistics 2016)
Seville, Spain, December 9th-11th 2016
Title: Joint modelling of diagnosis and survival time
Organized Invited Session EO045: Statistical design, modelling and inference (Organizers: Apostolos Batsidis, Polychronis Economou)

11th International Conference on Mathematical Problems In Engineering, Aerospace And Sciences: ICNPAA 2016
La Rochelle, July 5th-8th, 2016
Title: Control charts and differentiation of sampling schemes among Phase I and Phase II

International work-conference on Time Series (ITISE 2016)
Granada, June 27th-29th, 2016
Title: Detection of Outlier in Time Series Count Data
(Presented by my co-author V. Karioti)

Eighth International Workshop on Simulation
Vienna, September 21st - 25th, 2015
Title: On the Recruitment and Survival Time under the Assumption of Mean Residual Lifetime Bias Sampling

16th conference of ASMDA international society
Piraeus, 30th June - 4th July 2015
Title: Control Charts based on Weighted Distributions. (Presented by my co-author S. Bersimis)

16th conference of ASMDA international society
Piraeus, 30th June - 4th July 2015
Title: Characterization Properties based on weighted distribution. (Presented by my co-author G. Tzavelas)

16th conference of ASMDA international society
Piraeus, 30th June - 4th July 2015
Title: Analysing recurrent events with a first hitting time regression model. (Presented by my co-author C.Caroni)

International Conference on Risk Analysis ICRA 6/RISK 2015
Barcelona, May 26 - 29, 2015
Title: Non-stationary modelling of extremes of precipitation   and temperature over mountainous areas under climate change. (Presented by my co-author C. Caroni)

International Conference on Risk Analysis ICRA 6/RISK 2015
Barcelona, May 26 - 29, 2015
Title: First hitting time regression for recurrent events with random effects. (Presented by my co-author C. Caroni)

7th International Conference of the ERCIM WG on Computational and Methodological Statistics (ERCIM 2014)
Pisa, Italy, 6-8 December 2014
Title: Tests of fit for the lognormal distribution (Presented by my co-author A. Batsidis)

21th International Conference on COMPUTATIONAL STATISTICS (COMPSTAT 2014)
Geneva, Switzerland, 19-22 August 2014
Title: Goodness of fit tests for the lognormal distribution

11th International Vilinius Conference on Probability Theory and Mathematical Statistics
Vilnius, Lithuania, 30 June - 4 July 2014
Title: A generalized threshold regression model for time-to-event data (Presented by my co-author S. Malefaki)

5th International Conference on Risk Analysis (ICRA5)
Tomar, Portugal, 30 May - 1st June, 2013
Title: Threshold Regression Models for Recurrent Events

European Geosciences Union General Assembly 2013
Vienna, Austria, 07 - 12 April 2013
Title: Scale parameters in stationary and non-stationary GEV modeling of extreme precipitation (Presented by my co-author D. Panagoulia)

BioMed Conference Bayesian methods in Biostatistics and Bioinformatics
Barcelona, Spain, 17-19 December 2012
Title: Threshold Regression Models with Random Effects for Recurrent Events (Presented by my co-author S. Malefaki)

10th International Conference of Numerical Analysis and Applied Mathematics (ICNNAM 2012)
Kos, Greece, 19-25 September 2012
Title: How to identify the used sampling mechanism

20th International Conference on COMPUTATIONAL STATISTICS (COMPSTAT 2012)
Limassol, Cyprus, 27-31 August 2012
Title: A hidden competing risk model for survival data with a cured fraction

Stochastic Modeling Techniques and Data Analysis International Conference (SMTDA2012)
Chania Crete Greece, June 5 - 8, 2012
Title: Detect and Verify a Biased Sample Using Divergence Measures Based Sample Tests (Presented by my co-author G. Tzavelas)

4th International Conference on Risk Analysis (ICRA4)
Limassol, Cyprus, 26-29 May, 2011
Title: Testing Frailty Under Weibull Baseline Distribution Based on the Exact Likelihood Ratio Test

8th International Conference of Numerical Analysis and Applied Mathematics
Rhodes, Greece,19-25 September, 2010
Title: Testing nested distributions

28th European Meeting of Statisticians
Piraeus, Greece, 17-22 August, 2010
Title: Testing nested distributions - An application on frailty models

Third International Conference on Cancer Risk Assessment
Porto Heli, Greece,16-18 July, 2009
Title: Using Mixtures of Frailties to Model Survival Data

1st Athens-Pavia Meeting in Statistics
Mati, Attica, 3-6 June 2008
Title: Fitting parametric frailty and mixture models under biased sampling

Fifth International Mathematical Methods in Reliability (MMR)
Glasgow, Scotland, 1-4 July 2007
Title: Estimating parametric continuous frailty models and mixture models from biased samples of lifetime data (Presented by my co-author C. Caroni)

XIIth International Symposium on Applied Stochastic Models and Data Analysis
Chania, Greece, 29 May - 1 June 2007
Title: Parametric frailty and mixture models for lifetime data under biased sampling (Presented by my co-author C. Caroni)

Statistical Latent Variables Models in the Health Sciences
Perugia, Italy, 6-8 September 2006
Title: Proportional odds frailty models

Statistical Models for Biomedical and Technical Systems
Limassol, Cyprus, 29-31 May 2005
Title: Diagnostic plots for the frailty distribution in proportional hazards models

XIth International Symposium on Applied Stochastic Models and Data Analysis
Brest, France, 17-20 May 2005
Title: Diagnostic tests for frailty

3rd International EMR IBS Conference
Corfu, 10-12 May 2005
Title: Diagnostic tests for Gamma and Inverse Gaussian distributions of frailty