  We define a family of runoff rules that work as follows: voters cast approval
ballots over candidates; two finalists are selected; and the winner is decided
by majority. With approval-type ballots, there are various ways to select the
finalists. We leverage known approval-based committee rules and study the
obtained runoff rules from an axiomatic point of view. Then we analyze the
outcome of these rules on single-peaked profiles, and on real data.
