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You just made it: Individual incumbency advantage under Proportional Representation

Using close election outcomes, we identify a personal effect of incumbency on the probability of seeking election, and seeking and winning office in subsequent elections for elected officials in an Open List Proportional System. In many cases Danish local elections creates an as-if random distribution of candidates that are elected or not, which is an ideal setting for a Regression Discontinuity design. The incumbency advantage has been studied to a great extent, though primarily in pluralistic electoral systems, while more recent studies have extended the scope to Proportional Representation systems. This study adds to this budding literature by showing an advantage in a new context and focusing on candidate level electoral returns under conditions where candidates are arguably least likely to benefit from incumbency.

Is Door-to-Door Canvassing Effective in Europe? Evidence from a Meta-study across Six European Countries

A vast amount of experimental evidence suggests that get-out-the-vote encouragements delivered through door-to-door canvassing have large effects on turnout. Most of the existing studies have been conducted in the United States, and are inspiring European mobilization campaigns. This article explores the empirical question of whether the American findings are applicable to Europe. It combines existing European studies and presents two new Danish studies to show that the pooled point estimate of the effect is substantially smaller in Europe than in the United States, and finds no effects in the two Danish experiments. The article discusses why the effects seem to be different in Europe compared to the United States, and stresses the need for further experiments in Europe as there is still considerable uncertainty regarding the European effects. While one  possible explanation is that differences in turnout rates explain the differences in effect sizes, the empirical analysis finds no strong relationship between turnout and effect sizes in either Europe or the United States.

How Voter Mobilization from Short Text Messages Travels within Households and Families: Evidence from two Nationwide Field Experiments

Through two large GOTV field experiments in two different elections, we investigate the spillover effect to other household members and family members outside the household. We mobilized young voters with cell phone text messages, a campaign tactic unlikely to be observed by other persons than the treated. The direct effect varied but approximately 30 percent spilled over to other persons in the household, even parents. The effects are subtle and we cannot with certainty establish that a spillover effect exists. However, we demonstrate, using Bayesian updating, that even an initial skeptic becomes close to convinced that the effect spills over. Our study provides evidence by suggesting that young individuals’ decision to vote affect other household members, including their parents, to do the same. When young voters live without their parents, we find no evidence of spillovers to parents, suggesting that households are more important than families ties for turnout contagion.

Getting Out the Vote with Evaluative Thinking

Democratic institutions often do not evaluate their instruments. By working closely with authorities, we developed a field experiment to  examine an initiative to increase voter turnout among 18-year-olds that had not previously been evaluated. Particular attention was paid to developing an appropriate program theory and to designing the evaluation in a manner that was consistent with legal and ethical requirements. The program distributed different versions of mobilization letters to the newly enfranchised voters. The treatment effect was positive on turnout and diminished the gap in turnout across population groups, and the effects of the treatments were strongest for individuals with the lowest initial propensity to vote. Cost-effectiveness analysis indicated that the price of an additional vote was approximately USD$136. Our findings influenced policy design and helped establish the principle of evaluative thinking as an integrated part of the future program

Moving the campaign from the front door to the front pocket: field experimental evidence on the effect of phrasing and timing of text messages on voter turnout

Despite the widespread scholarly attention given to get-out-the-vote tactics the
recent one and a half decade, few have studied the effect of short text
messages (SMS) on voter turnout, and no previous such study has been
conducted outside the US. We analyze four SMS experiments with more than
300,000 voters conducted in relation to two elections in Denmark and find
intention-to-treat (ITT) effects between 0.33 and 1.82 percentage points with a
pooled effect of 0.74 percentage points. Furthermore, we vary the timing and
the content of the messages to test existing theories of text messages as
mobilization tools. In one experiment, we find messages delivered before
Election Day to have a higher effect than those delivered on Election Day, while
we find no additional effect of delivering multiple messages. We also vary
message content and in general find no significant differences from sending
different messages.

Twice the trouble: Twinning, costs, benefits, and voting

Scholars have argued that becoming a parent impacts political behavior, including turnout. On the one hand, children could be a stabilizing factor in a voter’s life and increase self-interest in elections. On the other hand, it could make voting more costly. We have little causal evidence to support either claim. In this paper, we identify the effect on turnout of having an addition child conditional on the decision to become a parent. When parents have a child, Nature sometimes assigns additional children through twinning. We argue that conditional on age of parents and birth cohort this as-if randomly assigns an extra child to some parents. With a large dataset of family composition and validated turnout for Danish voters, we find, consistent with additional children increasing the cost of voting, that an additional child depresses turnout for boths parents. The effect is substantially more negative for mothers than for fathers. A placebo test shows that voting does not predict twinning in future parities.

Trickle-up political socialization: The causal effect on turnout of parenting a newly enfranchised voter

Scholars have argued that children affect their parents’ political behavior, including turnout, through so-called trickle-up socialization. However, there is only limited causal evidence for this claim. Using a regression discontinuity design on a rich dataset, with validated turnout from subsets of Danish municipalities in four elections, we causally identify the effect of parenting a recently enfranchised voter. We consistently find that parents are more likely to vote when their child enters the electorate. On average across all four elections, we estimate that parents become 2.8 percentage points more likely to vote. In a context where the average turnout rate for parents is around 75%, this is a considerable effect. The effect is driven by parents whose children still live with them while there is no discernible effect for parents whose child has left home. The results are robust to a range of alternative specifications and placebo tests.