How might a proportional representation system be designed to better encourage constituency service?

Question

Quizplus · Accepted Answer

An ordinal ballot structure, such as a preferential voting system or ranked choice voting, would encourage candidates to reach out and provide constituency service to a wider range of voters. Under this system, candidates must appeal to a majority of voters, rather than just their own base, in order to win. This incentivizes candidates to be more responsive to the needs and concerns of all voters within their district, not just those who might be more likely to support them.

How Might a Proportional Representation System Be Designed to Better