Open list describes any variant of party-list proportional representation where voters have at least some influence on the order in which a party's candidates are elected. This as opposed to closed list, which allows only active members, party officials, or consultants to determine the order of its candidates and gives the general voter no influence at all on the position of the candidates placed on the party list. Additionally, an open list system can also allow a voter the alternative of voting for the party as a whole without expressing a preference between individuals. There are differences possible between varying open list systems, each giving the voter varying amounts of influence. Voter's choice is usually called preference vote.