My main research interests are concentrated in the area of presidential and party politics in European democracies as well as mixed-methods and ‘Big (Political) Data’.

  • Presidential Politics: My PhD and first book examined the use of presidential powers in Central and East European (CEE) democracies, 1990-2010. I am now focusing on presidential veto power in non-democratic regimes and international comparison as well as indirect presidential elections.
  • Party Politics: Together with Allan Sikk (UCL) I am currently working on new approaches to understanding party and party system change through the lens of electoral politics. We have compiled an original data set on electoral candidates in Central and Eastern Europe (ca. 250,000 candidates from 11 countries) which we plan to expand to other countries.
  • Research Methods: I have a keen interest in questions of political science methodology with a particular interest in mixed-methods approaches and elite interviewing as well as new forms of ‘Big (Political) Data’ and dealing with difficult data.



  • Köker, Philipp. 2017. Presidential Activism and Veto Power in Central and Eastern Europe. Cham: Palgrave Macmillan. [link]
  • Ledeneva, Alena, Bratu, Roxana and Köker, Philipp. (Eds.) 2017. Innovations in Corruption Studies. Cambridge: Modern Humanities Research Association. [link]
    (Previously published as Special Issue of the Slavonic and East European Review 95:1)


  • Sikk, Allan and Köker, Philipp. 2017. Party novelty and congruence: a new approach to measuring party change and volatility. Party Politics (in print).
  • Ledeneva, Alena, Bratu, Roxana and Köker, Philipp. 2017. Innovations in Corruption Studies: Bringing corruption studies in the 21st century. Slavonic and East European Review 95 (1): 1-20.
  • Köker, Philipp. 2014. Semi-structured elite interviews in a nested analysis framework: Studying presidential activism in Central and Eastern Europe. SAGE Research Methods Cases. (17 pp.) [Open Access version here]


  • Köker, Philipp. 2016. Review: Gwiazda, Anna. 2015. Democracy in Poland. Representation, participation, competition and accountability since 1989. East European Politics. 32 (3), 401-402. [link]
  • Köker, Philipp. 2015. Review: Nikolenyi, Csaba. 2014. Institutional Design and Party Government in Post-Communist Europe. Oxford: OUP. Europe-Asia Studies 67 (10): 1727-1728. [link]
  • Köker, Philipp. 2015. Review: ‘Presidents above Parties? Presidents in Central and Eastern Europe, Their Formal Competencies and Informal Power, Vít Hloušek (ed.)’ CEU Political Science Journal 10 (1-2): 147-150. [Open Access – link]


  • Risk or Reward: Party strategies and extra-parliamentarian electors in German presidential elections, 1949-2012. [abstract]
  • Rejuvenation or Renomination? Corruption and candidate turnover in CEE. (with Allan Sikk) [link]
  • Candidate Turnover and Party System Change in Central and Eastern Europe. (with Allan Sikk) [link]


  • Köker, Philipp. 2015. Veto et Peto: Patterns of Presidential Activism in Central and Eastern Europe. PhD thesis, University College London. Available at: