About me

I’m a second-year PhD candidate at the University of Edinburgh, where I’m fortunate to be advised by Dr. Aris Filos-Ratsikas, within the Laboratory for Foundations of Computer Science. Prior to that, I received a MCompSci from the University of Oxford, where I was also fortunate to be supervised by Prof. Paul Goldberg for my thesis.

My research interests lie in the intersection of Theoretical Computer Science and Economics, namely in the field of Algorithmic Game Theory. Thus far in my PhD, I have primarily worked on topics in Auction Theory, investigating the complexity of equilibrium computation in single-item first-price auctions, as well as autobidding auctions.

I’m also organizing the weekly Edinburgh CS/Econ Seminar, which usually takes place on Thursdays. Please reach out to me if you are interested in giving a talk!

News

• May. 27, 2025: I gave a talk at the Formal Analysis, Theory and Algortithms (FATA) Seminar of the University of Glasgow!

• May 14, 2025: Our paper Equilibrium Computation in First-Price Auctions with Correlated Priors (joint work with Aris Filos-Ratsikas, Yiannis Giannakopoulos, and Alexandros Hollender) has been accepted to EC’25 - see you in Stanford!

• May 13, 2025: I will participate in the 1st UK Workshop for Junior Researchers in Economics and Computation (JECCO 2025), which will take place in Edinburgh, on 15-16 June 2025.

• Apr. 29, 2025: I gave a talk at the Theory Seminar of the Archimedes Research Unit in Athens!

• Nov. 06, 2024: I am a member of the Local Support Team for WINE 2024, which will take place in Edinburgh, on 2-5 December 2024.

• Jul. 10, 2024: In August 2024, I will be attending the ADFOCS 2024 summer school organized by the Max Planck Institute for Informatics in Saarbrücken, Germany.

• May 18, 2024: Our paper On the Computation of Equilibria in Discrete First-Price Auctions has been accepted to EC’24 - see you in New Haven!

• Mar. 09, 2024: In June 2024, I will be attending and presenting a poster at the Workshop on Algorithms and Economics (WALE 2024) in Kefalonia, Greece.

Publications

• Equilibrium Computation in First-Price Auctions with Correlated Priors
  A. Filos-Ratsikas, Y. Giannakopoulos, A. Hollender, C. Kokkalis.
  To appear in the 26th ACM Conference on Economics and Computation (EC’25)

• On the Computation of Equilibria in Discrete First-Price Auctions
  A. Filos-Ratsikas, Y. Giannakopoulos, A. Hollender, C. Kokkalis.
  25th ACM Conference on Economics and Computation (EC’24)
  [arXiv] [WALE’24 Poster] [EC’24 Slides] [EC’24 Talk]

Preprints

• A Study of Variants of PPA-complete Problems
  C.Kokkalis.
  MCompSci Thesis, University of Oxford. 2022. [pdf]

Other Experience

Subreviewing

ESA 2025

Organizational

• Organizing the Edinburgh CS/Econ Seminar.

• Member of the Local Support Team for WINE 2024.