Algorithmic Collusion and the Complexity of Information-Value-Free Equilibria
A (coarse) correlated equilibrium (CE) is information-value-free (IVF) if a player can match the payoff obtained from recommendations by committing to a fixed action. Motivated by the problem of regulating algorithmic collusion, this refinement was introduced by Hartline, Wang, and Zhang [EC'26], who showed that it can be computed in polynomial time in explicitly represented normal-form game. In this paper, we examine the complexity of IVF(C)CEs in succinct games, which model more realistic strategic interactions that feature either many players or exponentially many pure strategies. We first show that computing an information-value-free CE is PPAD-complete in many-player polymatrix games...
| Authors | Ioannis Anagnostides, Weiqiang Zheng |
|---|---|
| Primary category | cs.GT |
| Published | 19 September 2026 |
| Last updated at source | 19 September 2026 |
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