Combined approval voting

Combined approval voting (CAV) is an electoral system where each voter may express approval, disapproval, or indifference toward each candidate. The winner is the candidate with the highest score, which is determined by subtracting the number of approval votes by the number of disapproval votes.

It is a cardinal system and a variant of score voting. It has also been referred to as dis&approval voting, balanced approval voting (BAV), approval with abstention option (AWAO), true weight voting (TWV1), or evaluative voting (EV) (though the latter can also be used for variants with more than 3 values.) It has also been called net approval voting (though this term has a different definition in the context of approval-based committee selection).

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