Responsibility Gap and Diffusion in Sequential Decision-Making Mechanisms

Abstract

Responsibility has long been a subject of study in law and philosophy. More recently, it became a focus of AI literature. The article investigates the computational complexity of two important properties of responsibility in collective decision-making: diffusion and gap. It shows that the sets of diffusion-free and gap-free decision-making mechanisms are ${\hat{I}}_2$-complete and ${\hat{I}}_3$-complete, respectively. At the same time, the intersection of these classes is ${\hat{I}}_2$-complete.