Canadian Election Study, 2004-2011

As a result of the Canadian Federal Election held on Monday June 28, 2004, the Liberal Party formed a minority government. Telephone surveys, conducted during the campaign and after the election with a random sample of Canadians, provide data that can be used to help explain the election outcome. Within 17 months, Canadians again went to the polls and the result of the January 23, 2006 vote was a second minority government, but under the leadership of the Conservative Party. Efforts were made to interview the respondents to the 2004 survey again for the 2006 survey and about one-half of the 2004 survey respondents also answered the 2006 survey. These re-interviews provide a panel or longitudinal sample component where a respondent's answers to questions in the first survey can be compared to those of the second survey. Many of the questions asked in 2004 were repeated in the 2006 survey. The remaining respondents to the 2006 survey were a random sample of Canadians. The 2008 Canadian Election Study consists of a survey with nearly 4500 eligible voters conducted during the second half of the election campaign. 3689 of these respondents completed a post-election survey as well. 1238 respondents who had participated in the 2004-2006 panel study were also interviewed after the election. All of the interviews were conducted by telephone. The final component of the study was a self-administered mail-back survey completed by 1939 respondents. The 2011 Canadian Election Study consists of 4 waves. Note that each survey wave is a different questionnaire: CPS is the Campaign Period Survey (by telephone), PES is the Post-Election Survey (by telephone), MBS is the Mailback Survey, and WEB is the final Web-based survey.

2004年6月28日周一举行的加拿大联邦选举结束后，自由党组建了少数派政府。研究团队在竞选期间及选举结束后，针对加拿大民众的随机抽样群体开展电话调查，所得数据可用于阐释此次选举的结果。
仅时隔17个月，加拿大便再次举行联邦选举，2006年1月23日的投票结果为保守党领导下的又一届少数派政府。研究人员尝试对2004年调查的受访对象进行回访，2004年的受访者中约有半数也参与了2006年的调查。此类回访形成了面板（panel）或纵向（longitudinal）样本组成部分，可用于对比受访者在两次调查中的作答内容。2004年调查中的多数问卷问题在2006年调查中得到重复设置。2006年调查的其余受访对象则为加拿大民众的随机抽样样本。
2008年加拿大选举研究（Canadian Election Study, CES）包含一项于竞选活动后半段开展的调查，覆盖近4500名符合选举资格的选民。其中3689名受访者同时完成了选举后调查。另有1238名曾参与2004-2006面板研究的受访者在选举后接受了访谈。本次研究的所有访谈均通过电话完成。本研究的最后一个组成部分为自填式邮寄回访问卷，共有1939名受访者完成作答。
2011年加拿大选举研究包含四个调查波次。需注意，每个调查波次对应不同的问卷：CPS为竞选期调查（Campaign Period Survey，电话访谈）、PES为选举后调查（Post-Election Survey，电话访谈）、MBS为邮寄回访调查（Mailback Survey），WEB则为最终的网络调查。