Why do parties change candidate lists between elections? Although candidate list volatility is an important indicator of the responsiveness of electoral representation, it has received little attention in research. We offer a critical case study of party list volatility in Finland, using a candidate-centred open-list proportional (PR) electoral system with ideal conditions for ‘ultra-strategic’ party behaviour. Our explorative two-stage research design begins with party elite interviews, to extract factors that can affect list volatility, which in the following step are tested in a regression analysis of 564 party lists in parliamentary elections 1983–2019. Our results show that list formation is a complex phenomenon, where demand and supply factors interact in a contingent fashion. Following trends of voter dealignment, personalization and ‘electoral-professionalization’ of parties, volatility has increased over time. Electoral defeats and declining party membership increase volatility, but a member-driven mass-party heritage that limits party elites’ strategic capacity has a stabilizing effect.

How do political parties react organizationally when the competitive context changes? Are all parties equally accustomed to adapting? In recent decades, the emergence of an electorally volatile and publicity-oriented style of politics has pushed Western parties to replace member-centred mass organizations with centralized ‘media agencies’. However, as has long been speculated, parties’ ‘genetic’ heritage may condition their adaptive capacity and threaten their competitiveness. This study presents the first comprehensive quantitative test of the impact of party ‘genetics’ on the ease of parties’ organizational professionalization in the cartel party era (1983–2018). It utilizes uniquely fine-grained time-series data on the financial and staff resources of central party offices to compare the adaptive processes of two ‘genetically’ distinct major Finnish parties – a social democratic mass party and a conservative cadre party. The study finds that although both parties have professionalized under strong external pressure, the ‘genetically’ election-driven cadre party case adapted much faster, and the member-oriented mass party case continues to invest much more in its membership organization.

This study examines whether (and how) parties adapt to party system saturation (PSS). A party system is oversaturated when a higher effective number of parties contests elections than predicted. Previous research has shown that parties are more likely to exit when party systems are oversaturated. This article examines whether parties will adapt by increasing the nicheness of their policy platform, by forming electoral alliances or by merging. Based on time-series analyses of 522 parties contesting 357 elections in twenty-one established Western democracies between 1945 and 2011, the study finds that parties are more likely to enter – and less likely to leave – electoral alliances if PSS increases. Additionally, a small share of older parties will merge. The results highlight parties’ limited capacity to adapt to their environments, which has important implications for the literature on party (system) change and models of electoral competition.

The literature on party politics has generally conceived of party change as party adaptation. Building on the theories of institutional change based on critical juncture analysis, our work contributes to the literature in two ways. Theoretically, by unpacking the concept of party change in three dimensions: adaptation, innovation, and persistence. This multidimensionality has been unduly neglected in the literature, too exclusively focussed on party adaptation. Empirically, the article analyses whether the attitudes and opinions of middle-level elites reveal adaptation, innovation, or persistence in their belief system at the beginning of the third millennium. Drawing upon a unique data set of national party delegates of 15 Italian political parties, regression results suggest that high entry barriers in party organizations may hinder Schumpeterian innovation.

This article provides a comprehensive theoretical model for analysing the influence of European party federations (Europarties) on their Central and Eastern European (CEE) partner parties. It draws on the concepts of Europeanization and party change and is, in principle, applicable to similar processes of party enlargement elsewhere. In the process of their Eastern enlargement, Europarties have searched for suitable CEE partner parties on which they have tried to exert influence. Thus far, little is known about the precise mechanisms involved and the actual impact of these processes. We argue that Europarty influence leads to party change on the side of the CEE partners, which brings about ‘West-Europeanization’. Europarties are expected to apply a double strategy that consists of a process of political exchange based on a largely asymmetric power relationship in favour of Europarties and a socialization strategy in which Europarties try to socialize their partners and convince them of the appropriateness of change. We present the theoretical and analytical tools for the analysis of the arguably largest extension of transnational party organizations, which provides ample testing ground for more general theories on party change. Furthermore, we present preliminary empirical evidence on the two most important cases, namely the European People's Party and the Party of European Socialists, which indicates that Europarties played an important role in the development of CEE parties and party systems in general.

The general question underlying this article is how much have parties changed in Italy in the transition from the First to the Second Republic? The disintegration of the Christian Democrats (DC) in the early 1990s created a large opening on the centre-right of the political spectrum, which was promptly occupied by Forza Italia (FI). A totally new party organisationally speaking, FI, with its centralisation, its personalisation and its charismatic leadership, marked a clear break with all that the DC had represented in terms of its unrestricted pluralism based on strong factions. However, the franchise model adopted by Berlusconi's party, characterised by the co-existence of unity of command at the top, and differentiated and quasi-autonomous bodies locally, may facilitate the convergence of the parties representing the various interests and outlooks on the centre-right in the new rassemblement party that is the PdL. Through the latter, and given the new systemic conditions, Italy may achieve a transformation in the nature of the centre from Christian Democratic to conservative, enabling it to integrate most of the political right as well.

This article examines party platform change in a third wave democratic country, Taiwan, during its first fourteen years of full multiparty elections. A variety of datasets show that Taiwan's parties have moved from polarized positions toward a moderate center on all core electoral issues. However, the parties have not converged into indistinguishable catchall parties; instead they have instituted a state of moderate differentiation. The degree to which Taiwan's parties have moderated and been electorally successful has been intimately tied to the internal balance of power between election-oriented and ideologically conservative factions or leaders. In response to public opinion and electoral competition, Taiwan's election-oriented leaders attempted to drag their parties toward centrist positions. The key variable constraining convergent party movement and maintaining differentiation has been the strength of ideologically conservative party factions. When these ideologically oriented factions have held the upper hand in parties, they have promoted ideologically orthodox but often unpopular policies. Even when the election-oriented faction is in control at the party center, secondary factions have been able to constrain movement away from party ideals.