Administration and Cost of Elections Project
IDEA: Institution for Democracy and Elections Administration
IFES: International Foundation for Electoral Systems
and the United Nations
New Zealand's Change to MMP
by Paul Harris
All democratic voting systems create incentives and disincentives which affect the behaviour of political parties and election candidates. It is well-established that different types of voting system can affect the nature of democratic representation and the composition of government. For example, countries which use a voting system based on proportional representation are more likely to have smaller parties represented in their legislatures, to have a multi-party governments, and to have representation from a variety of social groups. On the other hand, smaller parties find it more difficult to win seats under a simple plurality voting system, there tend to be single-party majority governments elected under that system, and the make-up of the legislature tends to be less diverse than in proportional systems.
However it is not only the type of voting system that is important. Variations within types of voting systems can also affect parties' chances of winning seats, and can affect the extent to which members of various social groups are present in the legislature. For example
The choices of the type and details of the voting system used to elect a legislature can thus raise significant integrity issues. But it must always be remembered that there is no perfect voting system. Although it is important that a democratic voting system should be fair, equal and transparent, those goals can be achieved in different ways. It is a matter for each country to judge which voting system will best achieve them in the context of its own history, culture and traditions.
Integrity issues are also raised concerning the process by which decisions are made about changing from one type of voting system to another. For example:
In 1993 New Zealand changed its voting system for parliamentary elections from the First-Past-the-Post system (FPP) to a system of proportional representation based on the German model, known as 'Mixed Member Proportional' (MMP)416. This paper outlines the way that change took place. It is not intended that New Zealand's process and experience should be taken as the model which other countries should follow. Rather the New Zealand experience is presented as a case study of why one country decided to change its voting system and the process by which the decision was made.
Why did New Zealand change to MMP?
Why did New Zealand one of the world's oldest democracies make such a major change in its constitutional arrangements, from its well-established single-member plurality voting system to the MMP system of proportional representation?
Three sets of circumstances help explain that change:
The 1992 referendum [a non-binding national referendum on electoral preferences]
author: Paul Harris
date created: Mon, 17 Jan 2000 02:51:40 GMT
date modified: 11/18/2000; 6:39:40 PM
last modified by: Sue Nelson