As there are many different forms of proportional representation some of them will be fairer than others. Implementing AV for example may help sort out the problem of MPs not receiving a majority in their constituency as they will now need to receive 50% of the vote in order to be elected. Yet it will do nothing for the other two problems identified. Minority parties are still unlikely to get any seats and parties with their vote uniformly spread across the country will still be punished. AV in both cases still favours geographically centered parties and still favors the top two parties over any smaller one as the small parties will drop out as the ballots are counted.