Preference voting systems where voters can rate individual candidates within a party list are becoming more popular. A study in Austria found that the way voters rate candidates can impact election results. When voters could give up to two points, male candidates were favored because male voters were more likely to give zero points to female candidates. However, in a system where voters could give positive and negative points, male voters were less likely to actively take points away from female candidates. This suggests that the design of preference voting systems can influence election outcomes.