Schriftliche Zusatzbefragung: vergleichende Untersuchung von Wahlsystemen (Comparative Study of Electoral Systems - CSES) - 2003

Selects 2003 was financed by the Federal Chancellery, the Swiss Academy for the Human and Social Sciences SAGW, and the Swiss National Science Foundation.

Post-election Survey
A national telephone survey was conducted immediately after the October elections, and correspondent contextual data was collected. The survey included 5900 interviews, of which 2000 were from a national representative sample. In addition, the number of interviews was increased to 600 in the cantons of Zurich, Bern, Luzern, Schaffhausen, Aargau, Ticino, Vaud, and Geneva, allowing for the effects of the variety of the electoral systems, parties, as well as differences in the political culture between cantons, to be taken into account in the analysis of electoral behavior. Additional interviews were also conducted to ensure at least 30 respondents in smaller cantons.

Panel Study 1999-2003
In Selects 1999, a panel study was conducted in the cantons of Zurich, Luzern, and Geneva, so as to study the opinion formation processes during the campaign. In 2003, 898 of the 2048 respondents from the national sample of Selects 1999 were interviewed, which permitted, for the first time in Switzerland, to study the stability and change in individual opinion and behavior between elections.

2003年选举研究（Selects 2003）由联邦总理府、瑞士人文与社会科学学院（Swiss Academy for the Human and Social Sciences, SAGW）以及瑞士国家科学基金会资助。

选举后调查
10月选举结束后即刻开展全国性电话调查，并收集了配套情境数据。本次调查共计完成5900份访谈，其中2000份来自全国代表性样本。此外，针对苏黎世、伯尔尼、卢塞恩、沙夫豪森、阿尔高、提契诺、沃州及日内瓦州，我们将该区域的访谈样本量扩充至600份，以便在选举行为分析中充分考量不同选举制度、政党差异，以及各州间政治文化差异对选举行为的影响。针对规模较小的州，我们还额外开展了访谈，以确保每个州至少有30名受访者。

1999-2003年追踪研究
在1999年选举研究（Selects 1999）中，我们于苏黎世、卢塞恩及日内瓦州开展了追踪研究，以考察竞选活动期间的舆论形成过程。2003年，我们对1999年选举研究全国样本中的2048名受访者中的898名进行了回访访谈，这在瑞士尚属首次，得以研究两次选举之间个体舆论与行为的稳定性及变迁。