51 citations · 242 across the 22 of their papers we have counts for
8 papers · 1 filter
A Peek into the Unobservable: Hidden States and Bayesian Inference for the Bitcoin and Ether Price Series
Constandina Koki, Stefanos Leonardos, Georgios Piliouras
Conventional financial models fail to explain the economic and monetary properties of cryptocurrencies due to the latter's dual nature: their usage as financial assets on the one s…
Strategic customer behavior in a queueing system with alternating information structure
Yiannis Dimitrakopoulos, Antonis Economou, Stefanos Leonardos
Strategic customer behavior is strongly influenced by the level of information that is provided to customers. Hence, to optimize the design of queueing systems, many studies consid…
PREStO: A Systematic Framework for Blockchain Consensus Protocols
Stefanos Leonardos, Daniel Reijsbergen, Georgios Piliouras
The rapid evolution of blockchain technology has brought together stakeholders from fundamentally different backgrounds. The result is a diverse ecosystem, as exemplified by the de…
On the Equilibrium Uniqueness in Cournot Competition with Demand Uncertainty
Stefanos Leonardos, Costis Melolidakis
We revisit the linear Cournot model with uncertain demand that is studied in Lagerlöf (2006)* and provide sufficient conditions for equilibrium uniqueness that complement the exist…
On the Mean Residual Life of Cantor-Type Distributions: Properties and Economic Applications
Stefanos Leonardos, Costis Melolidakis
In this paper, we consider the mean residual life (MRL) function of the Cantor distribution and study its properties. We show that the MRL function is continuous at all points, loc…
Oceanic Games: Centralization Risks and Incentives in Blockchain Mining
Nikos Leonardos, Stefanos Leonardos, Georgios Piliouras
To participate in the distributed consensus of permissionless blockchains, prospective nodes -- or miners -- provide proof of designated, costly resources. However, in contrast to…
Weighted Voting on the Blockchain: Improving Consensus in Proof of Stake Protocols
Stefanos Leonardos, Daniel Reijsbergen, Georgios Piliouras
Proof of Stake (PoS) protocols rely on voting mechanisms to reach consensus on the current state. If an enhanced majority of staking nodes, also called validators, agree on a propo…
Incentives in Ethereum's Hybrid Casper Protocol
Vitalik Buterin, Daniel Reijsbergen, Stefanos Leonardos +1
We present an overview of hybrid Casper the Friendly Finality Gadget (FFG): a Proof-of-Stake checkpointing protocol overlaid onto Ethereum's Proof-of-Work blockchain. We describe i…