Alesina, A., A. Devleeschauwer, W. Easterly, S. Kurlat, and R. Wacziarg. 2003. Fractionalization. Journal of Economic Growth 8 (2): 155–194.
Amorim Neto, O., and G.W. Cox. 1997. Electoral institutions, cleavage structures, and the number of parties. American Journal of Political Science 41 (1): 149–174.
Anckar, C. 2000. Size and party system fragmentation. Party Politics 6 (3): 305–328.
Arzheimer, K., and E. Carter. 2009. Christian religiosity and voting for West European radical right parties. West European Politics 32 (5): 985–1011.
Berger, P.L. 1963. A market model for the analysis of ecumenicity. Social Research 30 (1): 77–93.
Best, R. 2011. The declining electoral relevance of traditional cleavage groups. European Political Science Review 3 (2): 279–300.
Bolleyer, N. 2013. New parties in old party systems: Persistence and decline in seventeen democracies. Oxford: Oxford University Press.
Bormann, N.-C., and M. Golder. 2013. Democratic electoral systems around the world, 1946–2011. Electoral Studies 32 (2): 360–369.
Brown, D., and P. James. 2019. Religious characteristics of states dataset project—Demographics, version 2.0 (RCS-Dem 2.0), countries only. https://doi.org/10.17605/osf.io/7sr4m.
Bruce, S. 2002. God is dead: Secularisation in the west. Oxford: Blackwell.
Budde, E., S. Heichel, S. Hurka, and C. Knill. 2018. Partisan effects in morality policy making. European Journal of Political Research 57 (2): 427–449.
Chhibber, P., and K. Kollman. 2004. The formation of national party systems: Federalism and party competition in Canada, Great Britain, India, and the United States. Princeton: Princeton University Press.
Clark, W.R., and M. Golder. 2006. Rehabilitating Duverger’s theory: Testing the mechanical and strategic modifying effects of electoral laws. Comparative Political Studies 39 (6): 679–708.
Cox, G.W. 1997. Making votes count: Strategic coordination in the world’s electoral systems. Cambridge: Cambridge University Press.
Döring, H., and P. Manow. 2019. Parliaments and governments database (ParlGov): Information on parties, elections and cabinets in modern democracies. Development version. http://www.parlgov.org/. Accessed 12 Nov 2019.
Emanuele, V. 2015. Dataset of electoral volatility and its internal components in Western Europe (1945–2015). Rome: Italian Center for Electoral Studies. https://doi.org/10.7802/1112. Accessed 12 Nov 2019.
Engeli, I., C. Green-Pedersen, and L.T. Larsen. 2012. Morality politics in Western Europe: Parties, agendas and policy choices. Basingstoke: Palgrave Macmillan.
Ertman, T. 2009. Western European party systems and the religious cleavage. In Religion, class coalitions, and welfare states, ed. K. Van Kersbergen and P. Manow, 39–55. New York: Cambridge University Press.
Euchner, E.-M. 2019. Morality politics in a secular Age: Strategic parties and divided governments in Europe. Cham: Palgrave Macmillan.
Fearon, J.D. 2003. Ethnic and cultural diversity by country. Journal of Economic Growth 8 (2): 195–222.
Ferris, J.S., and M.-C. Voia. 2018. Political parties in Canada: What determines entry, exit and the duration of their lives? Party Politics. https://doi.org/10.1177/1354068818793659.
Fink, S. 2008. Politics as usual or bringing religion back in? The influence of parties, institutions, economic interests, and religion on embryo research laws. Comparative Political Studies 41 (12): 1631–1656.
Finke, R., and R. Stark. 1988. Religious economies and sacred canopies: Religious mobilization in American cities, 1906. American Sociological Review 53 (1): 41–49.
Franklin, M., T. Mackie, and H. Valen (eds.). 1992. Electoral change: Responses to evolving social and attitudinal structures in western countries. Cambridge: Cambridge University Press.
Gaines, B.J. 1999. Duverger’s law and the meaning of Canadian exceptionalism. Comparative Political Studies 32 (7): 835–861.
Gill, A. 1998. Rendering Unto Caesar: The Catholic Church and the State in Latin America. Chicago: University of Chicago Press.
Gill, A. 2005. The political origins of religious liberty: A theoretical outline. Interdisciplinary Journal of Research on Religion 1: 1–34.
Gill, A. 2017. Christian democracy without romance: The Perils of religious politics from a public choice perspective. Perspectives on Political Science 46 (1): 35–42.
Giorgi, A. 2013. Ahab and the white whale: The contemporary debate around the forms of Catholic political commitment in Italy. Democratization 20 (5): 895–916.
Helbling, H. 1995. The Church. In The New Switzerland: Problems and policies, ed. R. Kiesar and K.R. Spillmann, 298–309. Palo Alto: The Society for the Promotion of Science and Scholarship.
Iannaccone, L.R. 1998. Introduction to the economics of religion. Journal of Economic Literature 36 (3): 1465–1495.
Iannaccone, L.R., R. Finke, and R. Stark. 1997. Deregulating religion: The economics of church and state. Economic Inquiry 35 (2): 350–364.
Kalyvas, S.N. 1996. The rise of Christian democracy in Europe. Ithaca: Cornell University Press.
Langsæther, P.E. 2019. Religious voting and moral traditionalism: The moderating role of party characteristics. Electoral Studies. https://doi.org/10.1016/j.electstud.2019.102095.
Mantilla, L.F. 2019. Feed the Church, starve the party? Church-state relations and religious political mobilisation in 21 Catholic-majority countries. Religion, State & Society 47 (1): 87–103.
Maoz, Z., and E.A. Henderson. 2013. The world religion dataset, 1945–2010: Logic, estimates, and trends. International Interactions 39 (3): 265–291.
Marshall, M.G., and K. Jaggers. 2019. Polity IV project: Political regime characteristics and transitions, 1800–2018. Polity IV Project. https://www.systemicpeace.org/polityproject.html. Accessed 4 Feb 2020.
McCleary, R.M. 2017. Religion adherence data. https://scholar.harvard.edu/mccleary/data-sets. Accessed 31 July 2019.
McRoberts, O.M. 1999. Understanding the “new” black Pentecostal activism: Lessons from ecumenical urban ministries in Boston. Sociology of Religion 60 (1): 47–70.
Miller, K.D. 2002. Competitive strategies of religious organizations. Strategic Management Journal 23 (5): 435–456.
Norris, P., and R. Inglehart. 2004. Sacred and secular: Religion and politics worldwide. Cambridge: Cambridge University Press.
Ozzano, L. 2013. The many faces of the political god: A typology of religiously oriented parties. Democratization 20 (5): 807–830.
Ozzano, L. 2019. Religion, cleavages, and right-wing populist parties: The Italian case. The Review of Faith & International Affairs 17 (1): 65–77.
Ozzano, L., and F. Cavatorta. 2013. Introduction: Religiously oriented parties and democratization. Democratization 20 (5): 799–806.
Powell, E.N., and J.A. Tucker. 2013. Revisiting electoral volatility in post-communist countries: New data, new results and new approaches. British Journal of Political Science 44 (1): 123–147.
Putnam, R.D., and D.E. Campbell. 2010. American grace: How religion divides and Unites Us. New York: Simon & Schuster.
Rashkova, E.R. 2014. Ethnic heterogeneity and party system size: A district-level analysis. Comparative European Politics 12 (3): 249–278.
Raymond, C.D. 2016. Not all social cleavages are the same: On the relationship between religious diversity and party system fragmentation. Politics and Religion 9 (2): 364–388.
Raymond, C.D. 2019. Religious diversity and the number of religious parties around the world. Representation 55 (2): 197–213.
Rosenblum, N.L. 2003. Religious parties, religious political identity, and the cold shoulder of liberal democratic thought. Ethical Theory and Moral Practice 6 (1): 23–53.
Stark, R., and R. Finke. 2002. Beyond church and sect: dynamics and stability of religious economies. In Sacred markets, sacred canopies: Essays on religious markets and religious Pluralism, ed. T.G. Jelen, 31–62. Oxford: Rowman and Littlefield.
Stark, R., and L.R. Iannaccone. 1994. A supply-side reinterpretation of the “secularization” of Europe. Journal for the Scientific Study of Religion 33 (3): 230–252.
Tamney, J.B., and S.D. Johnson. 1990. Religious diversity and ecumenical social action. Review of Religious Research 32 (1): 16–26.
van de Ven, A.H. 1976. On the nature, formation, and maintenance of relations among organizations. The Academy of Management Review 1 (4): 24–36.
Volkens, A., W. Krause, P. Lehmann, T. Matthieß, N. Merz, S. Regel, and B. Weßels. 2018. The Manifesto data collection. Manifesto Project (MRG/CMP/MARPOR). Version 2018b. Berlin: Wissenschaftszentrum Berlin für Sozialforschung (WZB). https://doi.org/10.25522/manifesto.mpds.2018b. Accessed 31 Mar 2020.
von Beyme, K. 1985. Political parties in Western democracies. Aldershot: Gower.
Wagner, M.B. 1997. The demise of denominationalism in christian schools. Journal for the Scientific Study of Religion 36 (1): 13–24.
Watling, T. 2001. A new reformation for a ‘secularised’ world? Retaining ‘tradition’ while accommodating ‘change’. The Dialectics of the Ecumenical Movement in the Netherlands’, Journal of Contemporary Religion 16 (1): 85–104.
World Bank. 2019. World development indicators. https://databank.worldbank.org/data/indicator/NY.GDP.PCAP.CD/1ff4a498/Popular-Indicators#. Accessed 15 Oct 2019.