Mollie J. Cohen

Peer Reviewed Publications

A Dynamic Model of the Invalid Vote: How a Changing Candidate Menu Shapes Null Voting Behavior. 2018. Electoral Studies, 53: 111-121.


Electoral Volatility and Political Fractionalization in Latin America. With Facundo Salles Kobilanski and Elizabeth J. Zechmeister. Forthcoming, Journal of Politics

Protest Via the Null Ballot: An Assessment of the Decision to Cast an Invalid Vote in Latin America. 2018. Political Behavior, 40: 395-414. DOI: 10.1007/s11109-017-9405-9

            Supplementary information and replication code. Data available from the AmericasBarometer.


Cohen, Mollie J. and Amy Erica Smith. 2016. Do Authoritarians Vote for Authoritarians? Evidence from Latin America. Research and Politics. DOI: 10.1177/2053168016684066

            Replication code. Data available from the AmericasBarometer.



Manuscripts in Submission


Reducing Non-Response for Vote Choice in Nicaragua using Sensitive Survey Item Techniques (Under review)

Evidence from a survey experiment in Nicaragua reveals that treating vote choice as a sensitive item using audio technology significantly reduces non-response rates. I use audio interviewing techniques to ensure respondent anonymity from both third party observers and from interviewers. Compared to a control group, reminding participants that their answers were anonymous decreased non-response by ten percentage points, and non-response dropped even further when anonymized audio treatments were employed. Using different modes to ask the vote choice question also changes the substance of reported voting behavior: respondents in the reminder treatment are disproportionately likely to report voting for the incumbent. This experiment has implications for studies of voter behavior and public opinion in competitive authoritarian regimes generally: by minimizing the risks to respondents, this method enables us to simultaneously ask standard questions about politics and protect respondents from negative consequences they may face in their political environment.



Manuscripts in Preparation


Vote Buying and Public Opinion in the Americas (with Liz Zechmeister and Eui Young Noh)

Existing scholarship presents mixed views but little evidence regarding the public opinion consequences of vote buying. Many suggest that vote buying is an abuse of power and, therefore, should decrease trust in democratic institutions. Yet, others hold that vote buying can serve as a normal channel for political engagement, and should not erode citizens’ confidence in democratic processes. We test these competing claims in the Latin American case using data from the 2010-2014 AmericasBarometer surveys. We find that, on average across the region, exposure to vote buying undermines trust in and support for democracy. Yet, individuals vary in their reactions to vote buying offers. Specifically, we find that rural residence mitigates the negative effects of vote buying. Thus, we answer the general question about the effect of vote buying in Latin America, while also noting important systematic heterogeneity in responses to vote-buying offers.



Strategic Entry Under Uncertainty: The Peruvian Case


How does political uncertainty affect parties’ incentives to strategically enter competition? I argue that parties respond differentially to metrics of political opportunity when uncertainty is high. While established parties with national reputations are responsive to metrics identified with new party entry in established democracies (i.e., historical rates of “wasted” voting - that is, votes cast for parties that do not win seats - and relatively low barriers to entry), smaller ideological parties and political outsiders tend to respond to alternative metrics of political opportunity, including historical rates of invalid voting. Using data from national and subnational Peruvian elections from 1980 to 2014, I find results consistent with these expectations. I further find that single issue parties and political outsiders are substantially more likely to take advantage of fractured competition by entering in districts where the proportion of candidates to seats is high.



The Effect of Messages Promoting Invalid Voting in U.S. Presidential Elections


In the 2016 U.S. election, established Republican politicians stated publicly that they would not vote for their party’s presidential nominee. Rather, they planned to leave their presidential ballot blank, or vote for an unregistered write-in candidate – that is, to invalidate their votes. Elite statements promoting invalid voting are common around the world; yet, it is unclear whether such statements independently increase the observed number of blank or spoiled votes. Understanding the effect of calls for protest voting by established politicians is important because of their potential to decrease public support for key institutions (e.g., political parties). I use precinct level electoral data from the 2016 presidential election to show that support for elites who promoted invalid voting was associated with larger than expected increases in invalid voting in 2016, consistent with a causal effect of these messages. Evidence from an online experiment conducted during the campaign suggests that this effect is conditional: exposure to a message about invalid voting decreased respondents’ reported likelihood of invalidating their ballot on average, but low-knowledge Republicans were more likely to consider invaliding their ballots after receiving the message. Taken together, these findings suggest that messages promoting invalid voting can impact invalid vote rates, and also point to the importance of individual-level and contextual features in determining the effectiveness of these messages.



Campaigning for No-One: Elite Mobilization of the Invalid Vote in Latin American Presidential Elections


Invalid voting can serve as an expressive means for disgruntled individuals to participate in politics. Yet, high rates of blank and spoiled voting, particularly when publicized and mobilized by individuals promoting anti-political sentiment, hold the potential to decrease the legitimacy of political actors and, potentially, the democratic process. This paper documents the emergence of more than twenty invalid vote campaigns in Latin American presidential elections from 1980 to 2015 using stories from online archives of nationally-circulated newspapers across the region. I find that successful invalid vote mobilizations (that is, those that are associated with increased rates of blank and spoiled voting) are more likely to be organized by partisan elites, who are able to mobilize members of an existing constituency to cast "against all" ballots.





Research Reports and Chapters

“Latin American Views on Abortion in the Shadow of the Zika Epidemic.” With Claire Q. Evans. AmericasBarometer Topical Brief No. 33 (2018)

"Blaming the Victim: Knowledge of Tuberculosis is Associated with Greater Stigma in Brazil." With Heather Ewing, Marshall Eakin, Timothy Sterling, and Elizabeth J. Zechmeister. AmericasBarometer Insights No. 131 (2018)

"Measuring Political Knowledge in the AmericasBarometer." With Elizabeth J. Zechmeister. AmericasBarometer Methodological Note No. 003 (2018)


"Assessing and Improving Interview Quality in the 2016/17 AmericasBarometer."With Sebastian Larrea. AmericasBarometer Methodological Note No. 002 (2018)


"Democracy and Governance in the Americas: Key Findings from LAPOP’s AmericasBarometer." With Elizabeth J. Zechmeister and Noam Lupu. AmericasBarometer Topical Brief No. 30 (2017)


“Support for Electoral Democracy in the Americas.” Chapter in Eds. Cohen, Mollie J., Noam Lupu, and Elizabeth J. Zechmeister. 2017. The Political Culture of Democracy in the Americas: A Comparative Study of Democracy and Governance. 


Here’s what citizens who vote for authoritarians have in common.” With Amy Erica Smith, The Monkey Cage Blog, The Washington Post, November 2, 2016.

Declining Trust in Parties Likely to Increase Already-High Invalid Voting Rates in Peru’s National Elections.” AmericasBarometer Topical Brief No. 26 (2016)

Who is Interested in Politics?” With Ariel Helms, Hillary Rosenjack, Kelly Schultz, and Elizabeth J. Zechmeister. AmericasBarometer Insights No. 126 (2016)

Who Approves of Those Who Block Roads to Protest in the Americas?” With Christine Huang, Susan Ma, Kyle Uber, Lauren White, and Elizabeth J. Zechmeister. AmericasBarometer Insights No. 121 (2015)

Low Levels of External Efficacy Can be Improved by Government efforts to Deliver Better Outcomes.” With Hannury Lee, Ginny Randall, Jackson Vaught, and Elizabeth J. Zechmeister. AmericasBarometer Insights No. 115 (2015)

Effort Trumps Output in Predicting Satisfaction with Democracy.” With Kristina Bergmann, Kelly Perry, Kevin Zhang and Elizabeth J. Zechmeister. AmericasBarometer Insights No. 117 (2015)

Those with darker skin report slower police response time in the Americas.” With Elizabeth J. Zechmeister and Mitchell A. Seligson, AmericasBarometer Topical Brief  No. 16 (2015) [also published at The Monkey Cage Blog, The Washington Post, February 9, 2015]

Explaining Support for Interethnic Marriage in Four Countries.” AmericasBarometer Insights No. 77 (2012)

“Double Jeopardy: How U.S. Enforcement Policies Shape Tunkaseño Migration.” With Jonathan Hicken and Jorge Narvaez, in Cornelius, Wayne A. et al. (2010). Mexican Migration and the U.S. Economic Crisis: A Transnational Perspective. Center for Comparative Immigration Studies, San Diego, CA.