選舉制度的設計，不僅攸關各國政黨體制的運作與國家政府體制的鞏固，甚至對政府執政領導人事的更迭、政策制定的變遷，均有深刻的影響。對選民投票行為來說，更會因不同選制結構而展現出不同的決策思維。因此選制的相關規範設計，無疑是形塑先進民主國家政治體制運作的基礎，而選制變革過程中所產生的政治效應，更值得學界深入進行評估與檢驗。 本文根據日本選舉研究(JES)所彙整的定群追蹤調查，針對九零年代日本新舊選制的轉換過程，探析選民對政黨支持偏好的動態過程..

Electoral system is imperative to define the party system in a country. It also helps to consolidate the political regime, to formulate public policies, and to alternate government leaders in the office. From the constituent’s point of view, different electoral rules influence the behaviors and the way of voting as well. It is therefore without question that the electoral system is essential to regulate political systems in any democracy. This paper, based on the panel data collected from the Japanese Electio..

混合式選制融合了多數決與比例代表兩種選制的精神，不過關於此種選制兩票架構對投票的影響，有兩種截然不同的主張:一是認為兩票各自獨立運作，其影響可以獨立估算;另一派則主張兩票抉擇會相互影響，亦即具有所謂連動效果(interaction effects，或稱感染效果 contamination effects)的存在，因此必須綜合考量兩票架構的互動關係。而在日本施行的混合選制，又因允許候選人在兩種選票間重複提名，更使得其兩票間的連動關係益形複雜。 ..

The Mixed Electoral System combines the spirits of plurality and proportional representation. The way two-ballot structure influencing the voting behavior however is not settled. Of the two distinctive schools, one believed that two ballots work separately and therefore, their influences should be estimated independently. The other group advocated the existence of contamination effects (or interaction effects), and believed that it is necessary to consider the interaction between two ballots. As for the Mixed- Member Majorita..