The rise of negative partisanship and the nationalization of U.S. elections in the 21st century

One of the most important developments affecting electoral competition in the United States has been the increasingly partisan behavior of the American electorate. Yet more voters than ever claim to be independents. We argue that the explanation for these seemingly contradictory trends is the rise of negative partisanship. Using data from the American National Election Studies, we show that as partisan identities have become more closely aligned with social, cultural and ideological divisions in American society, party supporters including leaning independents have developed increasingly negative feelings about the opposing party and its candidates. This has led to dramatic increases in party loyalty and straight-ticket voting, a steep decline in the advantage of incumbency and growing consistency between the results of presidential elections and the results of House, Senate and even state legislative elections. The rise of negative partisanship has had profound consequences for electoral competition, democratic representation and governance.     

The conditioning role of polarization in U.S. senate election outcomes: A direct-election era & voter-level analysis

Recent work finds that a decline in the incumbency advantage coincides with the rise of partisanship as a determinant of congressional electoral outcomes. While this work updates our view of congressional elections, it is unclear if this holds in the more candidate-centered and high-information electoral context of the U.S. Senate. In this paper, I address these two considerations by evaluating a theory positing that polarization conditions the influence of incumbency and partisanship as Senate election determinants. Using data on the entire direct-election Senate era and survey data, this paper finds that: (1) polarization provides a partisan advantage for candidates running in states in which they are members of the partisan majority and (2) polarization positively conditions the incumbency advantage for Senators representing states that favor the other party. These findings suggest that Senators may still successfully cultivate a personal brand in the face of growing ideological differences between the parties.     

Beyond personal vote incentives: Dividing the vote in preferential electoral systems

Comparative studies of preferential electoral systems have paid much attention to the incentives for personalized instead of party-centered campaigns, but they have largely ignored how some of these systems allow “allocation errors” and so create incentives for parties to “manage” the vote and intraparty campaigns. We discuss how the single non-transferable vote (SNTV) and single transferable vote (STV) systems create these incentives, and we illustrate the degree to which they affect actual electoral results across seven preferential electoral systems. The analysis reveals statistically significant differences in the vote inequality among incumbent cohorts (members of the same party and district), indicating the strong influence of vote division incentives over candidate-centered electoral environments. The results also have important implications for comparative research on legislative turnover and the incumbency advantage.     

Manipulating Electoral Rules to Manufacture Single-Party Dominance

This article argues that the LDP manufactured its parliamentary dominance in postwar Japan by strategically altering specific facets of the electoral system. More generally, I demonstrate that intraparty politics play a crucial role in determining when and how electoral rules are changed. Despite widespread evidence that the LDP would win more seats under an SMP electoral formula, party leaders were repeatedly blocked from replacing the postwar MMD-SNTV system by intraparty incumbents, who feared that such a change would harm their individual reelection prospects. However, party leaders had greater leeway in altering rules that generated fewer intraparty conflicts. Between 1960 and 1990, the LDP implemented approximately fifty changes to campaign regulations, most of which were aimed at enhancing the incumbency advantage of all rank-and-file MPs. Statistical tests confirm that absent pro-incumbent revisions to the electoral code, the LDP would have succumbed to declining public popularity and lost its majority at least a decade earlier.     

Coattails and spillover-effects: Quasi-experimental evidence from concurrent executive and legislative elections

Concurrent elections are widely used to increase turnout. We theorize and show empirically how concurrency affects electoral outcomes. First, concurrency increases turnout and thereby the participation of peripheral voters. Second, in combined elections, one electoral arena affects the other. In our case of majoritarian executive elections concurrent to proportional representation (PR) legislative elections, the centripetal tendency of majoritarian elections colors off to the concurrent PR race. Third, concurrency also entails spillovers of the incumbency advantage of executive officeholders to the concurrent legislative race. Drawing on quasi-random variation in local election timing in Germany, we show that concurrency increases turnout as well as council votes for the incumbent mayor's party and centrist parties more generally, with slightly more pronounced gains for the political left. As a consequence, concurrent elections consolidate party systems and political power by leading to less fragmented municipal councils and more unified local governments.     

Incumbents' Interests and Gender Quotas

The introduction of mandatory gender quotas in party lists is a reform that many countries have recently adopted or have been considering. The electoral system affects the incumbents' incentives to make such reforms, their details, and their effectiveness. We show that male incumbents can actually expect an increased incumbency advantage when gender quotas are introduced, if they are elected through single‐member district majority rule. On the other hand, no expectation of male advantage can reduce the incumbents' fear of being replaced if they are elected through closed‐list proportional representation. As France has both electoral systems, we validate the above argument using a formal model of constitutional design as well as an empirical analysis of the legislative elections in France, displaying the existence of male bias in the last three elections. We also show that parity may have Assembly composition effects and policy effects that vary with the electoral system.     

Congressional campaign effects on candidate recognition and evaluation

To date, most congressional scholars have relied upon a standard model of American electoral behavior developed in the presidential setting. This research extends our knowledge of Congressmen's incumbency advantages and their sources. Candidate preference is viewed as a function of the relative recognition and evaluation of incumbents and their challengers, as well as of Democrats and Republicans. In the recognition model, contact with voters and media effects are quite important, but there is no direct role for party identification. Evaluation is a function of personal contact and party identification, and media variables are insignificant. Relative recognition, relative evaluation, and party identification are three important predictors of candidate preference, and incumbency itself adds little beyond what is contained in incumbent recognition and evaluation advantages.An earlier version of this paper was presented at the 1980 annual meeting of the Western Political Science Association, San Francisco, March 1980.     

How do candidates spend their money? Objects of campaign spending and the effectiveness of diversification

We present a novel approach to the study of campaign effectiveness using disaggregated spending returns from the 2007 Irish general election. While previous studies have focused on overall levels of expenditure as a predictor of electoral success, we consider the types of activities on which candidates spent money and the overall diversification of candidates’ campaign expenditure as predictors of electoral success. We offer a replicable framework for the measurement of campaign diversification as well as for the evaluation of its effects on electoral performance. We examine how factors such as campaign expenditure and candidates’ incumbency status condition the effects of campaign diversification. It is shown that diversification is only related to electoral success when campaigns are well-financed.     

The Variable Incumbency Advantage: New Voters, Redistricting, and the Personal Vote

In this article we explore the personal vote costs of redistricting. After redistricting, incumbents often face significant numbers of new voters—voters that were previously in a different incumbent's district. Existing conceptualizations of the incumbency advantage suggest that the cost to incumbents of having new voters should be relatively small and predictable. We propose a different formulation: a variable incumbency advantage. We argue that any incumbency advantage among the electorate is a function of short-term effects, partisanship, and electoral saliency. We use a massive untapped dataset of neighborhood-level electoral data to test our model and to demonstrate how the intersection of the personal vote, redistricting, and short-term environmental variables can provide a healthy margin to incumbents—or end their careers.     

The incumbency advantage in second-order PR elections: Evidence from the Irish context, 1942–2019

Do candidates in local elections benefit from an incumbency advantage? And which factors moderate the strength of this incumbency bonus? Analyzing seven decades of Irish local elections (1942–2019) conducted under proportional representation through the single transferable vote, we reassess and extend the mixed evidence on the incumbency advantage under proportional representation and in second-order elections. By applying the Regression Discontinuity Design, we find that the incumbency advantage is at least as strong in Irish local as in general elections, which are conducted under the identical electoral system. We also show that marginally elected candidates in local elections have much higher reelection probabilities when they do not face a high-quality candidate in their local electoral area after getting elected. The findings point to the importance of name recognition as a major driver of the incumbency advantage in local elections.     

Electoral Uncertainty and the Macroeconomy: the Evidence from Canada

The partisan advantage and incumbency advantage versions ofthe rational partisan business cycle model are tested. Bothmodels assume agents form weighted averages of partisaninflation rates during an election period, and differ only inhow the weights are formed which alters the form of businesscycles. The partisan advantage assumes fixed weightsdesignated for both major parties in each election, whereasthe incumbency advantage model assumes fixed weights forwhichever is the incumbent and opposition party in eachelection. The symmetric representation assumes each electionis a toss-up. Strongest support is found for a temporarysymmetric effect on the level of output, but none of themodels are supported for temporary electoral changes in growthor unemployment rates.     

The alternative incumbency effect: Electing women legislators in Indonesia

Between the 1999 and 2009 elections the proportion of national female legislators in Indonesia, the world's largest Muslim majority democracy, more than doubled. While this substantial increase may partly be explained by the recent imposition of a gender quota and placement mandate that have forced parties to increase the number of female candidates, quotas cannot fully explain the strong performance of women in the 2009 elections. First, many parties placed women higher on their lists than the laws required; second, voters appeared to over vote for women in some districts. Although incumbency's typical effect is to inhibit female electoral success by advantaging traditional (male) competitors, I argue that women benefited largely from an alternative effect: female incumbency can improve female candidate placement and electability by demonstrating female capacity and capability. Female newcomers benefited strongly from the presence of female incumbents in their own and bordering districts, thus suggesting a positive diffusion effect of female incumbency.     

You just made it: Individual incumbency advantage under Proportional Representation

Using close election outcomes, we identify a personal effect of incumbency on the probability of seeking election, and seeking and winning office in subsequent elections for elected officials in an Open List Proportional System. In many cases Danish local elections creates an as-if random distribution of candidates that are elected or not, which is an ideal setting for a Regression Discontinuity design. The incumbency advantage has been studied to a great extent, though primarily in pluralistic electoral systems, while more recent studies have extended the scope to Proportional Representation systems. This study adds to this budding literature by showing an advantage in a new context and focusing on candidate level electoral returns under conditions where candidates are arguably least likely to benefit from incumbency.     

Is there an incumbency advantage or cost of ruling in proportional election systems?

This paper investigates the effects of political representation on electoral outcomes at the party and coalition levels in proportional election systems using data from Swedish local government elections. There are two notions of representation, namely, to hold seats and to belong to the ruling coalition. I refer to the effect of the former as the incumbency effect and the effect of the latter as the ruling effect. The discontinuous variation in the seat share as the vote share varies for parties is used to isolate exogenous variation in incumbency. The discontinuous variation in ruling at the 50% seat share cutoff for coalitions is used in order to exogenous variation in ruling. I find that incumbency determines the distribution of 12% of the total vote, which is similar to the advantage found in majoritarian systems. I find no ruling effect, contrary to the commonly found cost of ruling in proportional systems.     

The incumbency disadvantage in South Korean National Assembly elections: Evidence from a regression discontinuity approach

In marked contrast to the findings from advanced democracies that incumbent office holders enjoy electoral advantages, this study finds that a substantial incumbency disadvantage exists in South Korean National Assembly (KNA) elections. I employ a quasi-experimental regression discontinuity design to distinguish the true effects of incumbency from the selection effects associated with candidate qualities, such as charisma and ability levels. My results show that serving a term in office reduces the probability of winning by around 20–30 percentage points and reduces the vote share by about 3–7 percentage points. Possible reasons for the incumbency disadvantage are briefly discussed, with an emphasis on the particularly high level of public discontent with governing elites in the KNA due to what voters perceive to be their widespread corruption.     

Incumbency advantage in multi-member districts: Evidence from congressional elections in Chile

Do parties enjoy an advantage to incumbency in multi-member districts? In this paper we answer this question by adapting a regression-discontinuity design to multi-member districts in congressional elections in Chile. The electoral system in place generates discontinuities in the number of elected representatives from each coalition at the 1/3 and 2/3 thresholds of the two-party vote share. Regression-discontinuity estimates indicate that, by holding two seats as opposed to holding only one, the left-leaning coalition obtains an extra 4.5% vote share in the next election and increases by 28 percentage points the probability of electing two candidates again. These results are in line with those obtained in previous studies in the U.S. but contrast with results obtained in developing countries which find a negative advantage to incumbency.     

Demonisation and electoral support for populist radical right parties: A temporary effect

Since the 1980s, Western Europe has experienced the surge of populist radical right parties. In an attempt to ward off these electoral newcomers, established parties have pursued strategies of disengagement, such as exclusion and de-legitimisation. This study examines the electoral effects of an excessive form of de-legitimisation, which we label ‘demonisation’. We estimate the effects of demonisation on electoral support for the Dutch Freedom Party (PVV) and its predecessor Groep Wilders. Time series analyses show that demonisation has a negative effect on electoral support, but only for Groep Wilders. Once the populist radical right party has made a successful entry into the party system, demonisation does not have its intended consequences.     

Controlling the Airwaves: Incumbency Advantage and Community Radio in Brazil

Direct influence over communication media is a potent resource during electoral campaigns, and politicians have an incentive to gain control of the airwaves to advance their careers. In this article, we use data on community radio license applications in Brazil to identify both the causal effect of incumbency on politicians’ ability to control the media and the causal effect of media control on their future electoral prospects. Using a regression discontinuity design, we compare city council candidates who barely won or barely lost an election, showing that incumbency more than doubles the probability of an application’s approval by the Ministry of Communications. Next, using genetic matching, we compare candidates who acquired community radio licenses before an election to similar politicians who did not, showing that a radio station substantially increases one’s vote share and probability of victory. These findings demonstrate that media control helps entrench local political power in Brazil.     

Win,lose, or withdraw: A categorical analysis of career patterns in the House of Representatives, 1948–1978

The literature on incumbency advantage has focused on margin as an indicator for electoral security. But while electoral margin is a goodex ante measure, it is a poorex post measure of security. Further, existing work has not integrated the choice of retirement with changes in the level of security. To improve the specification and definition of “marginality”, a multinomial LOGIT model is proposed where the dependent variable is categorical. Account is therefore taken of all the ways a Representative's term in office can end, including reelection, defeat, retirement, or pursuit of other office. The sample includes all U.S. Representatives elected for the first time between 1948 and 1978. The results indicate that (1) margin in the previous election is a significantex ante proxy for the probability of electoral defeat, and (2) while the electoral safety of all incumbents in the House has been increased, the increases are greater for members elected for the first time in the period since 1965.     

Is the party system affected by booms and busts? Not very much

The literature on party system fragmentation emphasizes how political institutions and social cleavages shape the long-term development of the party system, but short-term swings in economic performance could change the level of electoral fragmentation by affecting the concentration of the vote in the executive. Time series data from presidential elections in 59 countries and from district-level legislative election contests in 22 countries show that a growing economy is negatively associated with the effective number of parties winning votes: a strong economy leads to a slight reduction in fragmentation as the ruling party consolidates its rule while a weak economy tends to disperse votes among alternatives to it. But the effect of economic performance relative to political institutions and the incumbency advantage is at the margins. The modest size of this effect should remind scholars of the limits of the economy as an overall driver of voter choice. Keywords: Economic Voting, Party System Fragmentation, Duverger’s Hypothesis.