  We begin by formulating and characterizing a dominance criterion for prize
sequences: $x$ dominates $y$ if any impatient agent prefers $x$ to $y$. With
this in hand, we define a notion of comparative patience. Alice is more patient
than Bob if Alice's normalized discounted utility gain by going from any $y$ to
any dominating $x$ is less than Bob's discounted utility gain from such an
improvement. We provide a full characterization of this relation in terms of
the agents' discount rules.
