Bribery and Voter Control Under Voting-Rule Uncertainty

We study manipulative actions, especially bribery and control, under "voting-rule uncertainty," which means that there are two or more rules that may be used to determine the election's outcome. Among our highlights are that we show a new case in which "ties matter," we link manipulation and bribery in a way that shows many cases of single-bribery to be in polynomial time, we explore the relations between the bribery and control complexities of the underlying systems and their "uncertain" combination, and we obtain many results about the complexity of natural voting rules under votingrule uncertainty, most notably regarding control by adding voters under election families of the form {k 1-Approval,. .. , k ℓ-Approval, k1-Veto,. .. , k l-Veto}.