Does Misinformation Demobilize the Electorate? Measuring the Impact of Alleged " Robocalls " in the 2011 Canadian Election *

The paper presents evidence on the effect of voter demobilization in the context of the Canadian 2011 federal election. Voters in 27 ridings (as of February 26, 2012) allegedly received automated phone calls (‘robocalls’) that either contained misleading information about the location of their polling station, or were harassing in nature, claiming to originate from a particular candidate in the contest for local Member of Parliament. I use withinriding variation in turnout and vote–share for each party to study how turnout changed from the 2008 to the 2011 election as a function of the predominant party affiliation of voters at a particular polling station. I show that those polling stations with predominantly nonconservative voters experienced a decline in voter turnout from 2008 to 2011, and that this effect was larger in ridings that were allegedly targeted by the fraudulent phone calls. The results thus indicate a statistically significant effect of the alleged demobilization efforts: in those ridings where allegations of robocalls emerged, turnout was an estimated 3 percentage points lower on average. This reduction in turnout translates into roughly 2,500 eligible (registered) voters that did not go to the polls. The 95%-confidence interval gives a lower bound estimate of 1,000 fewer votes cast in robocall ridings, which is still a sizable effect.