About Me

I am a postdoctoral researcher at the Management Science Laboratory (MSL) of the Athens University of Economics and Business (AUEB). The research subject I am working on is statistical modeling of electricity dynamic pricing.

Click here to download my resume.

Experience

Postdoctoral Researcher
2025 - now     Athens University of Economics and Business

I am currently working as a researcher in the Management Science Laboratory (MSL). My research includes data analysis and model development on electricity dynamic pricing.

Teaching Assistant
2020 - 2025     National and Kapodistrian University of Athens

I conducted sessions and created teaching material, including R code, exercises, and assignments, for bachelor’s and master’s level courses on mathematical statistics, non- parametric statistics, linear models, Monte Carlo statistical methods and statistics for stochastic processes.

Data Analyst
2020 - now     Freelance - Part Time

I have worked on several projects as a freelance data analyst, gathering experience from a variety of fields including biostatistics, agronomy, psychology, and econometrics.

Education

PhD in Statistics

Dissertation Title: Parameter Estimation Methods in Multivariate Distribution Families with Applications in Remote Sensing Agriculture and Biostatistics

2020 - 2025     National and Kapodistrian University of Athens
MSc of Mathematics in Statistics & Operational Research
2018 - 2020     National and Kapodistrian University of Athens
Bachelor of Mathematics
2013 - 2018     National and Kapodistrian University of Athens
Bachelor of Music in Piano
2004 - 2016     Kos Center of Musical Studies (T. Kamateros), Zografos Conservatory (G. Politopoulos)

Publications in Peer-Reviewed Journals

Moment-Type Estimators for the Dirichlet and the Multivariate Gamma Distributions - Read it here
3 July 2025     Journal of Multivariate Analysis - Elsevier     Ioannis Oikonomidis, Samis Trevezas
Cumulative Link Mixed-Effects Models in the Service of Remote Sensing Crop Progress Monitoring - Read it here
30 November 2024     Biometrics - Oxford University Press     Ioannis Oikonomidis, Samis Trevezas

Presentations in Conferences

Regression Methods Adapted to Large-Scale Prediction of Crop Development Using Remote Sensing Data
11 December 2023     Department of Mathematics, University of Patras - Invited Talk     Ioannis Oikonomidis, Samis Trevezas
A Remote Sensing Application of Generalized Linear Mixed-Effects Models in Crop Phenology Prediction
7-10 June 2023     International Workshop on Applied Probability (IWAP)     Ioannis Oikonomidis, Samis Trevezas
The Method of Moments vs Maximum Likelihood An overestimated difference?
25-28 May 2023     Greek Statistical Institute (GSI)     Ioannis Oikonomidis, Samis Trevezas
Modeling the Variability of an Arabidopsis Thaliana Population with the Greenlab Model
19-22 May 2022     Greek Statistical Institute (GSI)     Ioannis Oikonomidis, Samis Trevezas
An Introduction to Statistics – A Case Study in Education
9-10 October 2021     Conference on Informatics in Education (CIE)     Ioannis Oikonomidis, Margarita Karaliopoulou
Regression-Type Approaches for Prediction of Crop Stage Percentages
23-26 September 2021     Greek Statistical Institute (GSI)     Ioannis Oikonomidis, Samis Trevezas
A Comparison of Hidden Markov and Regression Models on Crop Stage Percentages Prediction
1-4 June 2021     Applied Stochastic Models and Data Analysis International Society (ASMDA)     Ioannis Oikonomidis, Samis Trevezas

Software Development

joker: An S4-based Framework for Probability Distributions and Mathematical Statistics in R.
GitHub version     Ioannis Oikonomidis, Samis Trevezas

Awards & Scholarships

I would like to thank the Bodossaki Foundation and the Fanourakis Foundation for funding my Master's and PhD studies.

Best Statistics Paper Prize for Young Statisticians - See Announcement
2021     Greek Statistical Institute
PhD Scholarship
2024 - 2025     Fanourakis Foundation
PhD Scholarship
2021 - 2023     Bodossaki Foundation
Master’s Degree Scholarship
2019 - 2020     Bodossaki Foundation

Skills

Languages
Greek (Mother Language), English (B2), German (B1)
Driving License
Car (Category B), Motorcycle (Category A2)
Software & Programming Languages
R, Julia, MATLAB, jamovi, SPSS, Microsoft Office, HTML & CSS, LaTeX

Specializations

The Ultimate Git Course

Online specialization in Git and GitHub.

April 2022     Code with Mosh
Data Visualization & Dashboarding with R

Online specialization in advanced data visualization tools (ggplot2, plotly, shiny) with R, involving peer-reviewed assignments

2020 - 2021     John Hopkins University
Mastering Software Development in R

Online specialization in object-oriented programming, data visualization tools and package building with R, involving peer-reviewed assignments.

2019 - 2020     John Hopkins University

Hobbies

Board Games - RPG Games
I love board games and role-playing games such as Pathfinder and Dungeons & Dragons! I also enjoy PC games such as Divinity and Baldur's Gate. Roll initiative.
Piano
Even though I do not play as much as I used to, this remains one of my most valuable getaways. My favorite classical composers are Chopin and Beethoven.
Hellenic Red Cross Volunteer
I am a volunteer Samaritan and a Basic Life Support trainer at the Hellenic Red Cross, an organization dedicated to offering emergency medical aid, responding to disasters, and providing community health services. Check their official website.