## Research interests.

**Statistics:**

- Mathematical Statistics.
- Estimation theory. Contributions include estimators of the density, distribution and hazard rate function and automatic bandwidth selection.
- Statistical Inference. Development of hypothesis tests for goodness of fit, or assessment of symmetry of densities.
- Computational Statistics. Applications of bootstrap and cross validation based methods in mathematical statistics.
- In addition, a wide variety of miscellaneous topics in statistics, including applications.

**Probability:**

- Applications of Martingales and Edgeworth Expansions to statistical inference.
- Probabilistic bounds.

## Publications in international peer reviewed academic journals.

- D. Bagkavos and A. Kalamatianou, “Analysis of duration of studies data by kernel methods”, Communications in dependability and quality management, 10(2): 19-27, (2007).
- D. Bagkavos and P. N. Patil: Local polynomial fitting in failure rate estimation, IEEE Transactions on reliability, (57): 41-52, (2008). S-plus code.

- D. Bagkavos and P. N. Patil: Variable bandwidths for nonparametric hazard rate estimation, Communications in Statistics – Theory and Methods, (38): 1055–1078, (2009). S-plus code.

- D. Bagkavos: Transformations in hazard rate estimation, Journal of Nonparametric Statistics, (20): 721-738, (2008). S-plus code.

- D. Bagkavos: Local Linear Hazard Rate Estimation And Bandwidth Selection, Annals of the Institute of Statistical Mathematics, (63): 1019–1046, (2011).
- D. Bagkavos: Local linear variable bandwidth hazard rate estimation, Journal of Statistical Computation and Simulation, (81): 1517–1531, (2011). S-plus code.

- P.N. Patil, P.P. Patil and D. Bagkavos: A Measure of Asymmetry, Statistical papers, (53): 971–985, (2012). S-plus code.

- P. N. Patil and D. Bagkavos: Semiparametric Smoothing of Discrete Failure Time Data, Biometrical Journal, (54): 5–19, (2012). S-plus code. Sterilization Data.

- P. N. Patil and D. Bagkavos: Histogram for Hazard Rate Estimation, Sankhya B, (74): 286-301, (2013). S-plus code.

- D. Bagkavos and D. Ioannidis: Smooth confidence intervals for the survival function under random right censoring, Electronic Journal of Statistics, (6): 843–860, (2012).
- D. Bagkavos, D. Ioannides and A. Kalamatianou: A goodness of fit test for the survival function under random right censoring, Electronic Journal of Statistics, (7): 2550–2576, (2013). R code.

- P. N. Patil, D. Bagkavos and Α. T. A. Wood: A measure of asymmetry based on a new necessary and sufficient condition for symmetry, Sankhya (76): 123–145, (2014). S-plus code.

- H. Hua, P.Ν. Patil and D. Bagkavos: Semiparametric smoothing approach to hazard rate estimation, Journal of Nonparametric Statistics, (26), 669-693, (2017).
- D. Bagkavos and P.N. Patil: A new test of bivariate independence. Journal of Multivariate Analysis, (160), 117-133, (2017). R code.

- H. Hua, P.Ν. Patil and D. Bagkavos: An L1 analysis of a kernel-based hazard rate estimator. Australian and New Zealand Journal of Statistics, (60), 43–64, (2018).
- F. Alevizos, D. Bagkavos and D. Ioannides: Efficient estimation of a distribution based on censored data. To appear, Statistics and Probability Letters.

## Selected publications in peer reviewed conference proceedings.

- D. Bagkavos: Transformations In Hazard Rate Estimation For Heavy-Tailed Data, (Invited). 7th IFAC Conference on Manufacturing Modelling, Management and Control, International Federation of Automatic Control, St. Petersburg, Russia, Bakhtadze, N., Chernyshov, K., Dolgui, A. and Lototsky, V. (Eds.), pp: 928-933 (2013), Springer. DOI: 10.3182/20130619-3-RU-3018.00262. R code. DFL data.

- D. Bagkavos and P. N. Patil: Power assessment of a new test of independence, (Invited). M.G. Akritas et al. (eds.), Topics in Nonparametric Statistics, Springer Proceedings in Mathematics & Statistics vol. 74, pp 13-19, 2015.
- P. N. Patil, D. Bagkavos and A.T.A. Wood: A Numerical Study of the Power Function of a New Symmetry Test, (Invited). Second Conference of the International Society for Nonparametric Statistics. Cádiz, Spain. June 12-16, 2016.

## Contributed R packages (CRAN).

- NPHazardRate: Functions and examples for histogram, kernel (classical, variable bandwidth and transformations based), discrete and semiparametric hazard rate estimators. The package is based on the material of articles 2, 3, 4, 5, 8 and 9 above.

## Refereed for:

Journal of the Royal Statistical Society, Section A (1), Section B (1), Communications in Statistics - Theory and Methods (3), Communications in Statistics - Simulation and Computation (2), Statistics and Probability Letters (3), Journal of Applied Statistics (1), Metrika (1), Australian and New Zealand Journal of Statistics (1), Test (1), Computational Statistics and Data Analysis (1), Journal of the Korean Statistical Society (1), Statistical Papers (1).