日本民主黨於 2009 年的眾議院選舉中擊敗執政的自由民主黨，黨魁鳩山由紀夫於 9 月 16 日成為日本首相。由於民主黨在參議院未過半，為了維持國會穩定運作，鳩山首相選擇與社會民主黨、國民新黨組成聯合內閣。 不過鳩山政權內部不斷出現閣員之間的對立，而鳩山首相始終無法處理這些政府決策過程之中所發生的混亂，學者與主要媒體多認為，發生混亂的原因是在於鳩山本人的領導能力不足。不過本論文認為，導致鳩山政權內部的混亂主因是民主黨建構的決策運作模式本..

Yukio Hatoyama, the chairman of the Democratic Party of Japan (DPJ), succeeded to the Prime Minister of Japan on 16 September 2009 after DPJ won the 2009 Japanese general election. In the election, DPJ acquired 308 out of a total of 480 seats in the House of Representatives of Japan, while the Liberal Democratic Party(LDP), the former ruling party only acquired 119 seats. However, Hatoyama was thus forced to form a coalition government with the Social Democratic Party and the People’s New Party in response to a situatio..

本文主要從日本政治經濟結構當中非正式制度的轉變來探討 1990 年之後日本經濟衰退的主要原因。在過去分析日本經濟衰退的原因大多是從國際層次與國內層次兩個面向來分析，在國際層次方面包括自由化的衝擊與日圓的急遽升值;在國內層次方面則包括政府主導模式的失調與規制緩和的調控，而這些面向主要焦點都集中在國際化與自由化的轉變對日本國內政經制度的衝擊，而忽略日本國內制度轉型的重要性。本文認為在過去這些文獻探討大多集中在日本正式制度的調整，而忽視非正式制度的存在與轉變。本文..

The goal of this paper is to explore the roots of Japanese economic recession in the 1990s from the transition of informal institutions in Japan. In the past, analysis of the Japanese economic recession in the 1990s was used to the aspect of international dimension and domestic dimension; focuses on the formal institutions such as political reform, fiscal reform, administrational reform, and financial reform, and neglected the changes of informal institutions. The argument of this paper bases on the fact that Japan has reform..