  In this paper, we reveal that the signal representation of information
introduced by Gentzkow and Kamenica (2017) can be applied profitably to dynamic
decision problems. We use this to characterize when one dynamic information
structure is more valuable to an agent than another, irrespective of what other
dynamic sources of information the agent may possess. Notably, this robust
dominance is equivalent to an intuitive dynamic version of Brooks, Frankel, and
Kamenica (2022)'s reveal-or-refine condition.
