Search Results for author: Aris Filos-Ratsikas

Found 8 papers, 1 papers with code

AI-driven Prices for Externalities and Sustainability in Production Markets

1 code implementation10 Jun 2021 Panayiotis Danassis, Aris Filos-Ratsikas, Haipeng Chen, Milind Tambe, Boi Faltings

Traditional competitive markets do not account for negative externalities; indirect costs that some participants impose on others, such as the cost of over-appropriating a common-pool resource (which diminishes future stock, and thus harvest, for everyone).

Fairness

The Complexity of Splitting Necklaces and Bisecting Ham Sandwiches

no code implementations31 May 2018 Aris Filos-Ratsikas, Paul W. Goldberg

We do this via a PPA-completeness result for an approximate version of the CONSENSUS-HALVING problem, strengthening our recent result that the problem is PPA-complete for inverse-exponential precision.

Reinforcement Mechanism Design for e-commerce

no code implementations25 Aug 2017 Qingpeng Cai, Aris Filos-Ratsikas, Pingzhong Tang, Yiwei Zhang

We study the problem of allocating impressions to sellers in e-commerce websites, such as Amazon, eBay or Taobao, aiming to maximize the total revenue generated by the platform.

Anytime Heuristic for Weighted Matching Through Altruism-Inspired Behavior

no code implementations25 Feb 2019 Panayiotis Danassis, Aris Filos-Ratsikas, Boi Faltings

We present a novel anytime heuristic (ALMA), inspired by the human principle of altruism, for solving the assignment problem.

Infochain: A Decentralized, Trustless and Transparent Oracle on Blockchain

no code implementations27 Aug 2019 Naman Goel, Cyril van Schreven, Aris Filos-Ratsikas, Boi Faltings

For the first time, we show how to implement a trustless and transparent oracle in Ethereum.

Rewarding High-Quality Data via Influence Functions

no code implementations30 Aug 2019 Adam Richardson, Aris Filos-Ratsikas, Boi Faltings

We consider a crowdsourcing data acquisition scenario, such as federated learning, where a Center collects data points from a set of rational Agents, with the aim of training a model.

Federated Learning Vocal Bursts Intensity Prediction

Putting Ridesharing to the Test: Efficient and Scalable Solutions and the Power of Dynamic Vehicle Relocation

no code implementations17 Dec 2019 Panayiotis Danassis, Marija Sakota, Aris Filos-Ratsikas, Boi Faltings

We study the optimization of large-scale, real-time ridesharing systems and propose a modular design methodology, Component Algorithms for Ridesharing (CAR).

On the Complexity of Equilibrium Computation in First-Price Auctions

no code implementations4 Mar 2021 Aris Filos-Ratsikas, Yiannis Giannakopoulos, Alexandros Hollender, Philip Lazos, Diogo Poças

We consider the problem of computing a (pure) Bayes-Nash equilibrium in the first-price auction with continuous value distributions and discrete bidding space.

Computer Science and Game Theory Computational Complexity

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