Journal Articles

A.R.N. Ross, C. Vaccari, A. Chadwick (2022). Russian Meddling in US Elections: How News of Disinformation’s Impact Can Affect Trust in Electoral Outcomes and Satisfaction with Democracy. Mass Communication & Society, 25:6, 786-811, DOI: 10.1080/15205436.2022.2119871

C. Vaccari, A. Chadwick., J. Kaiser (2022). The Campaign Disinformation Divide: Believing and Sharing News in the 2019 UK General Election. Political Communication, DOI: 10.1080/10584609.2022.2128948

A. Chadwick, J. Kaiser, C. Vaccari (2022). The Amplification of Exaggerated and False News on Social Media: The Roles of Platform Use, Motivations, Affect, and Ideology. American Behavioral Scientist, DOI: 10.1177/00027642221118264

Trilling, D., Kulshrestha, J., Vreese, C. de, Halagiera, D., Jakubowski, J., Möller, J., Puschmann, C., Stępińska, A., Stier, S., & Vaccari, C. (2022). Is sharing just a function of viewing? The sharing of political and non-political news on Facebook. Journal of Quantitative Description: Digital Media, 2.

Vaccari, C. (2022). When Journalists Run for Office: The Effects of Journalist-Candidates on Citizens’ Populist Attitudes and Voting Intentions. International Journal of Communication, 16, 3422-3442.

Kaiser, J., Vaccari, C., Chadwick, A. (2022). Partisan Blocking: Biased Responses to Shared Misinformation Contribute to Network Polarization on Social Media, Journal of Communication, 2022;, jqac002,

Freeman, D., Lambe, S., Yu, L., Freeman, J., Chadwick, A., Vaccari, C., . . . Loe, B. (2021). Injection fears and COVID-19 vaccine hesitancyPsychological Medicine, 1-11. doi:10.1017/S0033291721002609.

Freeman, D., B.S. Loe, L.-M. Yu, J. Freeman, A. Chadwick, C. Vaccari, M. Shanyinde, V. Harris, F. Waite, L. Rosebrock, A. Petit, S. Vanderslott, S. Lewandowsky, M. Larkin, S. Innocenti, A.J. Pollard, H. McShane, S. Lambe (2021). Effects of different types of written vaccination information on COVID-19 vaccine hesitancy in the UK (OCEANS-III): A single-blind, parallel-group, randomised controlled trial. The Lancet Public Health, DOI: 10.1016/S2468-2667(21)00096-7.

Ceccobelli, C. Vaccari (2021). A virus in the hybrid media system: how the Conte government communicated the coronavirus crisisContemporary Italian Politics, 13(2), DOI: 10.1080/23248823.2021.1906529.

A. Chadwick, J. Kaiser, C. Vaccari, D. Freeman, S. Lambe, B.S. Loe, … L.M.-Yu (2021). Online Social Endorsement and Covid-19 Vaccine Hesitancy in the United Kingdom. Social Media + Society, 7, DOI: 10.1177/20563051211008817.
>>> Winner of the Paul Lazarsfeld award for the best paper in Political Communication presented in 2021 , awarded by the Political Communication section of the American Political Science Association.

D. Freeman, B.S. Loe, A. Chadwick, C. Vaccari, F. Waite, L. Rosebrock, L., … S. Lambe. (2020). COVID-19 Vaccine Hesitancy in the UK: The Oxford Coronavirus Explanations, Attitudes, and Narratives Survey (OCEANS) IIPsychological Medicine, 1–34, DOI: 10.1017/S0033291720005188

L., Miller, C. Vaccari (2020). Digital threats to democracy: comparative lessons and possible remediesThe International Journal of Press/Politics, 25(3), 333-356, DOI: 10.1177/1940161220922323

G. Mazzoleni, C. Vaccari (2020). 20 years of political communication scholarship: Accomplishments, changes, and challenges. Comunicazione politica21(1), 5-20.

Vaccari, C., Chadwick, A. (2020). ‘Deepfakes and Disinformation: Exploring the Impact of Synthetic Political Video on Confusion and Trust in News’. Social Media + Society, 6(1), DOI: 10.1177/2056305120903408.

Vaccari, C. Smets, K., Heath, O. (2020). ‘The United Kingdom 2017 election: Polarisation in a split issue space’. West European Politics, 43(3), pp. 587-609, DOI: 10.1080/01402382.2019.1655961

Zilinsky, J. Vaccari, C. Nagler, J., Tucker, J. (2020). ‘Don’t Republicans Tweet Too? Using Twitter to Assess the Consequences of Political Endorsements by Celebrities’. Perspectives on Politics, 18(1), pp. 144-160, DOI: 10.1017/S1537592719002603

Vaccari, C., & Valeriani, A. (2018). ‘Digital Political Talk and Political Participation: Comparing Established and Third Wave Democracies‘. SAGE Open, 8(2), 2158244018784986.

C. Vaccari, A. Valeriani (2018). ‘Dual Screening, Public Service Broadcasting, and Political Participation in Eight Western Democracies’. International Journal of Press/Politics, 23(3), pp. 367-388, DOI: 10.1177/1940161218779170

A. Chadwick, C. Vaccari, B. O’Loughlin (2018). ‘Do tabloids poison the well of social media? Explaining democratically dysfunctional news sharing’. New Media & Society, DOI: 10.1177/1461444818769689

C. Vaccari, C. Wagemann (2018). ‘Outsiders Looking In and Insiders Looking Out: A Comparative Study of Newspaper Coverage of Italian-German Relationships in the 2013 Elections’. Contemporary Italian Politics, 10(1), pp.76-95, 10.1080/23248823.2018.1435198

A. Valeriani, C. Vaccari (2018). ‘Political Talk on Mobile Instant Messaging Services: A Comparative Analysis of Germany, Italy, and the United Kingdom’. Information, Communication & Society, 21(11), pp. 1715-1731, DOI: 10.1080/1369118X.2017.1350730

B. O’Loughlin, C. Vaccari, J. Dennis, B. Aslan (2017). ‘Twitter and Global Political Crises: Cycles of Insecurity in #PrayforParis and #PrayforSyria’. Middle East Journal of Culture and Communication, 10(2-3), pp. 175-203, DOI: 10.1163/18739865-01002006

A. Chadwick, B. O’Loughlin, C. Vaccari (2017). ‘Why People Dual-Screen Political Debates and Why It Matters for Democratic Engagement’. Journal of Broadcasting and Electronic Media, 61(2), pp. 220-239, DOI: 10.1080/08838151.2017.1309415

C. Vaccari (2017). ‘Online Mobilization in Comparative Perspective: Digital Appeals and Political Engagement in Germany, Italy, and the United Kingdom’. Political Communication, 34(1), pp. 69-88, DOI: 10.1080/10584609.2016.1201558.
>>> Winner of the award for the best article in information technology and politics published in 2016, awarded by the Information Technology and Politics section of the American Political Science Association.

C. Vaccari, A. Valeriani, P. Barberá, J. Jost, J. Nagler, J. Tucker (2016). ‘Of Echo Chambers and Contrarian Clubs: Exposure to Political Disagreement Among German and Italian Users of Twitter’. Social Media & Society, 2(3), DOI: 10.1177/2056305116664221

C. Vaccari, A. Valeriani (2016). ‘Party Campaigners or Citizen Campaigners? How Social Media Deepen and Broaden Party-Related Engagement’. International Journal of Press/Politics, 21(3), pp. 294-312, DOI: 10.1177/1940161216642152

A. Valeriani, C. Vaccari (2016). ‘Accidental Exposure to Politics on Social Media as Participation Equalizer: Inadvertent Encounters with Political Information, Interest in Politics and Online Participation in Germany, Italy, and the United Kingdom’. New Media & Society, 18(9), pp. 1857-1874, DOI: 10.1177/1461444815616223

C. Vaccari, A. Chadwick, B. O’Loughlin (2015). ‘Dual Screening the Political: Media Events, Social Media, and Citizen Engagement’. Journal of Communication, 65(6), pp. 1041-1061, DOI: 10.1111/jcom.12187.
>>> Winner of the 2016 Walter Lippmann Award for the best article in political communication published in 2015, awarded by the Political Communication section of the American Political Science Association.

D. Campus, L. Ceccarini, C. Vaccari (2015). ‘What a Difference a Critical Election Makes: Social Networks and Political Discussion in Italy between 2008 and 2013’. International Journal of Public Opinion Research, 27(4), pp. 588-601, DOI: 10.1093/ijpor/edv045

C. Vaccari, A. Valeriani, P. Barberá, R. Bonneau, J. Jost, J. Nagler, J. Tucker (2015). ‘Political Expression and Action on Social Media: Exploring the Relationship between Lower- and Higher-Threshold Political Activities among Twitter Users in Italy’. Journal of Computer-Mediated Communication, 20(2), pp. 221-239, DOI: 10.1111/jcc4.12108

C. Vaccari, A. Valeriani (2015). ‘Follow the Leader! Direct and Indirect Flows of Political Communication During the 2013 Italian General Election Campaign’. New Media & Society, 17(7), pp. 1025–1042, DOI: 10.1177/1461444813511038

C. Vaccari (2015). ‘The Features, Impact, and Legacy of Berlusconi’s Campaign Techniques, Language, and Style’. Modern Italy, 20(1), pp. 25-39, DOI: 10.1080/13532944.2014.985583

C. Vaccari (2014). ‘You’ve Got (No) Mail: How Parties and Candidates Respond to Email Inquiries in Western Democracies’. Journal of Information Technology & Politics, 11(2), pp. 245-258, DOI: 10.1080/19331681.2014.899536

C. Vaccari, M. Morini (2014). ‘The Power of Smears in Two American Presidential Campaigns: Comparing the Swift Boat Veterans for Truth and “Obama is a Muslim” Campaigns’. Journal of Political Marketing, 13(1-2), pp. 19-45, DOI: 10.1080/15377857.2014.866021

C. Vaccari, A Valeriani, P. Barberá, R. Bonneau, J. Jost, J. Nagler, J. Tucker (2013). ‘Social Media and Political Communication: A Survey of Twitter Users During the 2013 Italian General Election’. Italian Political Science Review / Rivista Italiana di Scienza Politica, 43(3), pp. 381-410, DOI: 10.1426/75245

R. Nielsen, C. Vaccari (2013). ‘Do People “Like” Candidates on Facebook? Not Really: Large-Scale Direct Candidate-to-Voter Online Communication as an Outlier Phenomenon’. International Journal of Communication, 7, pp. 2333-2356, DOI: 1932–8036/20130005. Translated into Portuguese as ‘As pessoas curtem os políticos no Facebook? Não mesmo! A comunicação direta em larga escala entre candidatos e eleitores como um fenômeno outlier’. Revista Eletrônica de Ciência Política, 5(2), 2014, pp. 228-256, DOI: 10.5380/recp.v5i2.41061

C. Vaccari, R. Nielsen (2013). ‘What Drives Politicians’ Online Popularity? An Analysis of the 2010 U.S. Midterm Elections’. Journal of Information Technology & Politics, 10(2), pp. 208-222, DOI: 10.1080/19331681.2012.758072

C. Vaccari (2013). ‘From Echo Chamber to Persuasive Device? Rethinking the Role of the Internet in Campaigns’. New Media & Society, 15(1), pp. 109-127, DOI: 10.1177/1461444812457336

C. Vaccari (2013). ‘A Tale of Two E-Parties: Candidate Websites in the 2008 U.S. Presidential Primaries’. Party Politics, 19(1), pp. 19-40, DOI: 10.1177/1354068810391287

C. Vaccari (2011). ‘The News Media as Networked Political Actors: How Italian Media Are Reclaiming Political Ground by Harnessing Online Participation’. Information, Communication & Society, 14(7), pp. 981-997, DOI: 10.1080/1369118X.2011.572984

C. Vaccari (2010). ‘“Technology is a Commodity”: The Internet in the 2008 United States Presidential Election’. Journal of Information Technology & Politics, 7(4), pp. 318-339, DOI: 10.1080/19331681003656664

D. Campus, G. Pasquino, C. Vaccari (2008). ‘Social Networks, Political Discussion and Voting in Italy: A Study of the 2006 Election’. Political Communication, 25(4), pp. 423-444, DOI: 10.1080/10584600802427039

C. Vaccari (2008). ‘From the Air to the Ground: The Internet in the 2004 US Presidential Campaign’. New Media & Society, 10(4), pp. 647-665, DOI: 10.1177/1461444808093735

C. Vaccari (2008). ‘Research Note: Italian Parties’ Websites in the 2006 Elections’. European Journal of Communication, 23(1), pp. 69-77, DOI: 10.1177/0267323107085839

C. Vaccari (2008). ‘Surfing to the Élysée: The Internet in the 2007 French Elections’. French Politics, 6(1), pp. 1-22, DOI: 10.1057/palgrave.fp.8200139

Book Chapters

C. Vaccari, A. Valeriani (forthcoming). ‘Political filter bubbles and fragmented publics’. In S. Coleman, L. Sorensen (Eds), Handbook of Digital Politics. Cheltenham: Edward Elgar, accepted for publication in March 2022.

N. Ritchie, D. Wring, K. Rafter, C. Vaccari (2022). ‘A Gulf Across the Irish Sea? The European Election Campaigns in the United Kingdom and the Republic of Ireland’. In E. Novelli, B. Johansson, D. Wring (Eds), The 2019 European Electoral Campaign in the Time of Populism and Social Media. London: Palgrave Macmillan, ISBN: 978-3-030-98992-7, pp. 159.178.

A.R.N. Ross, A. Chadwick, C. Vaccari (2021). ‘Digital media and the proliferation of public opinion cues online: Biases and vulnerabilities in the new attention economy’. In J. Morrison, J. Birks, M. Berry (Eds), The Routledge Companion to Political Journalism. London: Routledge, ISBN: 9780367248222, pp. 241-251.

R. Armitage, C. Vaccari (2021). ‘Misinformation and Disinformation’. In H. Tumber, S. Waisbord (Eds), The Routledge Companion to Media Disinformation and Populism. London: Routledge, ISBN: 978-0-367-435769, pp. 38-48.

Deacon, D, Wring, D, Smith, D, Vaccari, C. (2020). Here, There and Everywhere: Brexit and the Mainstream News Coverage During the 2019 General Election. In J. Mair, T. Clark, N. Fowler, R. Snoddy, R. Tait (Eds) Brexit, Boris and the Media., ISBN: 9781845497644, pp. 1-14.

C. Vaccari (2018). ‘Online Mobilization in Comparative Perspective: Digital Appeals and Political Engagement in Germany, Italy, and the United Kingdom’. In K. Koc-Michalska, D. Lilleker (Eds), Digital Politics: Mobilization, Engagement and Participation. London: Routledge, ISBN: 978-1-138-625396. (reprint of the article published in Political Communication in 2018).

S. Castano, A., Ferrara, E., Gallinucci, M., Golfarelli, S., Montanelli, L., Mosca, L., C. Vaccari, (2018). ‘SABINE: A multi-purpose dataset of semantically-annotated social content’. In International Semantic Web Conference (pp. 70-85). Springer.

P. Barberá, C. Vaccari, A. Valeriani (2017). ‘Social Media, Personalization of News Reporting, and Media Systems’ Polarization in Europe’. In M. Barisione, A. Michailidou (Eds), Social Media and European Politics: Rethinking Power and Legitimacy in the Digital Era. London: Palgrave Macmillan, ISBN: 978-1-137-59889-9, pp. 25-52.

L. Mosca, C. Vaccari, A. Valeriani (2016). ‘An Internet-Fuelled Party? The Five Star Movement and the Web’. In F. Tronconi (Ed), Beppe Grillo’s Five Star Movement: Organisation, Communication and Ideology. Farnham: Ashgate, ISBN: 9781472436634, pp. 127-152.

C. Vaccari (2015). ‘Blogging, Political’. In G. Mazzoleni, K. Barnhurst, K. Ikeda, R. Maia, H. Wessler (Eds), International Encyclopedia of Political Communication. New York: John Wiley and sons, ISBN: 978-1-118-29075-0, pp. 65-72.

L. Mosca, C. Vaccari, A. Valeriani (2015). ‘How to Select Citizen Candidates: The Five Star Movement’s Online Primaries and their Implications’. In A. De Petris, T. Poguntke (Eds), Anti-Party Parties in Germany and Italy. Rome: LUISS University Press, ISBN: 978-88-6856-028-7, pp. 165-192.

C. Vaccari (2014). ‘A Europe Wide Web? Political Parties’ Websites in the 2009 European Parliament Elections’. In A. Solo (Ed), Political Campaigning in the Information Age. Hershey, PA: IGI Global, ISBN: 9781466660625, pp. 66-87.

C. Vaccari (2013). ‘City Hall 2.0? Italian Local Executive Officials’ Presence and Popularity on Web 2.0 Platforms’. In P. Nixon, R. Rawal, D. Mercea (Eds), Politics and the Internet in Comparative Context: Views from the Cloud. London: Routledge, ISBN: 978-0415638678, pp. 169-185.

C. Vaccari (2012). ‘Online Participation in Italy: Contextual Influences and Political Opportunities’. In E. Anduiza, L. Jorba, M. Jensen (Eds), Digital Media and Political Engagement Worldwide: A Comparative Study. Cambridge, MA: Cambridge University Press, ISBN: 978-1107668492, pp. 138-159.

C. Vaccari (2012). ‘The News Media as Networked Political Actors: How the Italian Media are Reclaiming Political Ground by Harnessing Online Participation’. In B. Loader, D. Mercea (Eds), Social Media and Democracy: Innovations in Participatory Politics. London: Routledge, ISBN: 978-0415542340, pp. 77-90 (reprint of the article published in Information, Communication & Society in 2011).

C. Vaccari (2010). ‘Missed Opportunities: The Debate on Immigrants’ Voting Rights in Italian Newspapers and Television’. In M. Ardizzoni, C. Ferrari (Eds), Beyond Monopoly: Globalization and Contemporary Italian Media. Lanham, MD: Lexington Books, ISBN: 978-0739128510, pp. 203-224.

R. Grandi, C. Vaccari (2009). ‘Election Campaigning and the New Media’. In D. Albertazzi, C. Brook, C. Ross, N. Rothenberg (Eds), Resisting the Tide: Cultures of Opposition under Berlusconi (2001-06). New York, NY and London: Continuum, ISBN: 978-1441176134, pp. 46-56.

C. Vaccari (2009). ‘Web Challenges to Berlusconi: An Analysis of Oppositional Sites’. In D. Albertazzi, C. Brook, C. Ross, N. Rothenberg (Eds), Resisting the Tide: Cultures of Opposition under Berlusconi (2001-06). New York, NY and London: Continuum, ISBN: 978-1441176134, pp. 135-147.

C. Vaccari (2006). ‘Meet “Silvio” and “Romano”: Political Communication as Personal Storytelling’. In J.O. Frosini, G. Pasquino (Eds), For a Fistful of Votes: The 2006 Italian Elections. Bologna: CLUEB, ISBN: 9788849126877, pp. 75-101.

Other Publications

J. Tucker, A. Guess, P. Barbera, C. Vaccari, A. Siegel, S. Sanovich, D. Stukal, B. Nyhan (2018). Social Media, Political Polarization, and Political Disinformation: A Review of the Scientific Literature, commissioned by the Hewlett Foundation.

B. O’Loughlin, J. Szostek, C. Vaccari (2017). Written evidence submitted to the UK Parliament inquiry on ‘fake news’.

C. Vaccari (2014). ‘Response to the consultation themes set forth by the Digital Democracy Commission’. UK Parliament Speaker’s Commission on Digital Democracy Website.

C. Vaccari (2014). ‘Most political parties completely fail to respond to email enquiries, wasting an opportunity for politicians to reconnect with voters online’. Democratic Audit UK blog.

G. Mazzoleni, C. Vaccari (2010). ‘Obama and Internet Politics One Year After: A First Look at the Digital Presidency’. Political Communication Report, 20, 1/2.

In Italian

I have authored and co-authored more than fifty peer-reviewed journal articles and book chapters on the following topics: American Presidential and Congressional elections; British election campaigns; online campaigning in Italy, France, and the United States; political communication in Italian elections; campaigning in local Italian elections; war and American political discourse; personalization of politics; new social movements; media coverage of interest groups; the Five Star Movement.

A full list including my Italian publications can be accessed via my institutional page at the University of Bologna.