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.

翻译：我们定义了一套运行方式如下的径流规则:选民对候选人投核准票;两个决赛选手被选中;获胜者由多数人决定。通过批准类型的选票,有多种方法选择决赛者。我们利用已知的基于审批的委员会规则,从不言而喻的角度研究获得的径流规则。然后我们分析了这些规则对单点剖面和真实数据的结果。