1. Multi-agent Performative Prediction with Greedy Deployment and Consensus Seeking Agents
- Author
-
Li, Qiang, Yau, Chung-Yiu, and Wai, Hoi-To
- Subjects
Optimization and Control (math.OC) ,FOS: Mathematics ,Mathematics - Optimization and Control - Abstract
We consider a scenario where multiple agents are learning a common decision vector from data which can be influenced by the agents' decisions. This leads to the problem of multi-agent performative prediction (Multi-PfD). In this paper, we formulate Multi-PfD as a decentralized optimization problem that minimizes a sum of loss functions, where each loss function is based on a distribution influenced by the local decision vector. We first prove the necessary and sufficient condition for the Multi-PfD problem to admit a unique multi-agent performative stable (Multi-PS) solution. We show that enforcing consensus leads to a laxer condition for the existence of Multi-PS solution with respect to the distributions' sensitivities, compared to the single agent case. Then, we study a decentralized extension to the greedy deployment scheme [Mendler-D\"unner et al., 2020], called the DSGD-GD scheme. We show that DSGD-GD converges to the Multi-PS solution and analyze its non-asymptotic convergence rate. Numerical results validate our analysis., Comment: 27 pages, 5 figures
- Published
- 2022