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Research

Interests

  • Game theory: equilibrium concepts, oligopolies, 2-stage games.
  • Blockchains: cryptoeconomics, incentives.
  • Revenue management: pricing, unimodality conditions, comparative statics.
  • Strategic behavior: voting systems, queues.

Journal Publications

  1. S. Leonardos & C. Melolidakis, Endogenizing the cost parameter in Cournot oligopoly, International Game Theory Review, to appear. [arxiv]
  2. S. Leonardos & C. Koki, Coalitions & Voting Power in the Greek Parliament of 2012: A Case Study, Homo Oeconomicus, (2019). [journal]
  3. S. Leonardos & C. Melolidakis, On the commitment value and commitment optimal strategies in bimatrix games, International Game Theory Review, (2018). [journal]

Conference Publications

  1. N. Leonardos, S. Leonardos & G. Piliouras, Oceanic Games: Centralization Risks and Incentives in Blockchain Mining, International Conference on Mathematical Research for Blockchain Economy, (2019) [Best paper award][arxiv]
  2. S. Leonardos, D. Reijsbergen, G. Piliouras, Weighted Voting on the Blockchain: Improving Consensus in Proof of Stake Protocols,  IEEE – International Conference on Blockchain and Cryptocurrency, (2019) [Best paper award]. [arxiv]
  3. V. Buterin, D. Reijsbergen, S. Leonardos & G. Piliouras, Incentives in Ethereum’s Hybrid Casper Protocol, IEEE – International Conference on Blockchain and Cryptocurrency, (2019). [arxiv]

Refereed Book Chapters

  1. Y. Dimitrakopoulos, A. Economou and S. Leonardos, Customer equilibrium behavior in a Markovian queue with an on/off information mechanism (short paper)QTNA2019, LNCS Springer Series, to appear. [pdf]
  2. S. Leonardos & C. Koki, Political Indicators in Germany and Greece: Evolving Political Systems, Distinct Paths and a Mutual Future. German-Greek Yearbook of Political Economy vol.2 (invited), to appear. [pdf]
  3. C. Koki, S. Leonardos & C. Melolidakis, Measuring Market Performance with Stochastic Demand: Price of Anarchy and Price of Uncertainty, LNCS/LNAI Springer Series, (2018). [book chapter]
  4. C. Koki, S. Leonardos & C. Melolidakis, Comparative Statics via Stochastic Orderings in a Two-Echelon Market with Upstream Demand UncertaintyAIRO Springer Series, (2019). [book chapter]

Working Papers

  • S. Leonardos, D. Reijsbergen, G. Piliouras, Weighted Voting on the Blockchain: Improving Consensus in Proof of Stake Protocols, International Journal of Network Management, under submission. [arxiv]
  • V. Buterin, D. Reijsbergen, S. Leonardos & G. Piliouras, Incentives in Ethereum’s Hybrid Casper Protocol, International Journal of Network Management, under submission. [arxiv]
  • S. Leonardos, D. Reijsbergen & G. Piliouras, PRESTO: A Systematic Framework for Blockchain Consensus Protocols, IEEE Transactions in Engineering Management, submitted. [paper]
  • S. Leonardos & C. Melolidakis, A Class of Distributions for Linear Demand Markets, Naval Research Logistics, review and resubmit. [arxiv]
  • S. Leonardos & C. Melolidakis, Monopoly Pricing in a Vertical Market with Demand Uncertainty, European Journal of Operational Research, under submission. [arxiv]
  • S. Leonardos & C. Melolidakis, A Note on Equilibrium Uniqueness in Cournot Competition with Demand Uncertainty, The B.E. Journal of Theoretical Economics, under submission. [arxiv]
  • S. Leonardos & C. Melolidakis, A Note on the Mean Residual Function of the Cantor Distribution, Applied Mathematical Sciences, under submission. [arxiv]
  • Y. Dimitrakopoulos, A. Economou and S. Leonardos, Strategic customer behavior in a queueing system with alternating information structureProduction and Operations Management, submitted. [arxiv]
  • J. Freixas & S. Leonardos, Some impossibility results on power indices, work in progress.

 

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