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..