Abstract
How durable are the political accountability effects of the worst pandemic in a century? We track the effects of the COVID-19 pandemic on political preferences through its “high” and “low” phases in the Czech Republic. Uniquely, we ask about the effects of both the health and the economic costs of the pandemic measured at both personal and municipality levels. Consistent with the literature, we estimate effects suggestive of political accountability of leaders during “high” pandemic phases without higher support for non-democratic alternatives. However, we also find that the pandemic political accountability effects are mostly short-lived, and do not extend to the first post-pandemic elections.
Introduction
The outbreak of a major new infectious disease can affect societal values and preferences: It can increase people’s xenophobia and hostility towards foreigners (Bartoš et al. 2021), and it can be exploited as such by politicians Campante, Depetris-Chauvin, and Durante (2024). When a new infection turns into a pandemic and results in large-scale economic disruptions, it can generate economic hardship, which is known to lead to rising support for populist and extremist parties (e.g., Autor et al. 2020; Dippel et al. 2021). The radical right also exploits growing anti-science sentiments, particularly during pandemics (Zulianello and Guasti 2023). Central and Eastern Europe was expected to be under a particular threat of democratic erosion and populism during the pandemic (Bohle and Eihmanis 2022).
Yet a growing literature that explores the effects of the COVID-19 pandemic on political preferences and election outcomes finds little evidence of rising support for extremist or populist parties during early “high” stages of the COVID-19 pandemic—when lock-downs occurred and deaths spiked. Initial lock-downs appear to have led to rising support for incumbents (Bol et al. 2021; Giommoni and Loumeau 2020), and democratic accountability seems to apply to populist leaders who are perceived as less competent in handling the pandemic, similarly to normal (non-pandemic) political contests (Baccini, Abel, and Weymouth 2021; Neundorf and Pardos-Prado 2022; Wu and Huber 2021). There is comparatively less evidence on the late-pandemic and post-pandemic political consequences.
In this paper, we extend the literature by tracking the effects of the COVID-19 pandemic on political preferences during multiple phases of the pandemic. Similar to existing work, we measure these effects at “high” early phases of the pandemic. Next, we provide novel evidence on “low” phases, when COVID-19 fatalities decline, and we also study the first post-pandemic national elections. Our research design is thus well suited for asking about the durability of pandemic-induced changes in political preferences—an important dimension of the political accountability literature (e.g., Duch and Stevenson 2010; Tilley, Neundorf, and Hobolt 2018). We ask about the political consequences of both the health and the economic costs of the pandemic, in line with findings in Becher et al. (2024) that people use information on both types of performance when evaluating governments during the pandemic. We also extend the COVID-19 literature, which typically relies on location-specific aggregate measures, by measuring the health and economic costs of the pandemic at both a local (municipality) level and at the individual personal-experience level; this minimizes ecological fallacy concerns.
We study the case of the Czech Republic, which endured some of the longest COVID-19 lock-downs and one of the highest pandemic death rates in the EU.
1
Figure 1 shows the evolution of COVID-19 fatalities in the country during the pandemic. The four vertical lines signify the four points of our analysis. We study the effect of the pandemic on survey-reported political preferences in two “high” COVID-19 phases: after the first major wave of COVID-19 deaths (Nov 2020, “1st Wave”), and after all major waves (Apr 2021, “All Waves”). Next, we do the same in a “low” pandemic phase, when COVID-19 fatalities first declined to near-zero (Jun 2021, “Post Covid”). Finally, we study actual voting and election outcomes in the first national elections held after the pandemic (Oct 2021, “Elections”). Evolution of Daily COVID-19 Fatalities in the Czech Republic. Note: We observe political preferences and/or votes in Nov 2020, Apr 2021, Jun 2021, and Oct 2021. The COVID-19 waves prior to Nov 2020 and Apr 2021 correspond to national lock-downs.
We measure the health and economic costs of the pandemic 2 at both individual and municipality level, studying both personal experience and group-level exposure to the pandemic. We use precise municipality measures of the severity of the pandemic as well as information on having personally experienced the illness, and having a friend or family member who died of COVID-19. Our study is based on two types of data. First, we use municipality data on COVID-19 deaths and unemployment as of each of the four points of our analysis, as well as municipality data on election outcomes in the Oct 2017 and Oct 2021 parliamentary elections, that is, national elections held before and after the pandemic. We leverage extensive variation in COVID-19 fatalities across the more than 200 Czech (higher-level) municipalities. 3 Second, we rely on a longitudinal survey of about 2,000 respondents starting in Mar 2020. In four waves of the survey (corresponding to the four points of our analysis shown in Figure 1), respondents state their political preferences, and report on their personal exposure to COVID-19 and on having experienced a job loss. The survey also contains information about respondents’ voting behavior in the Oct 2017 and Oct 2021 parliamentary elections.
We track the effects of the pandemic by studying changes in political preferences between 2017 and each of the four points of our analysis, that is, by repeatedly using a simple fixed-effect model based on two time periods. 4 We study the impact of the pandemic on support for three groups of political parties: the populist government (in power during the pandemic), the extremist opposition parties (far-left and far-right), and the mainstream democratic opposition (both opposition groups being in the Parliament during the pandemic).
The five key variables in our analysis of political preferences are (i) municipality share of unemployed (relative to 2017), (ii) municipality share of COVID-19 fatalities in the population from the start of the pandemic, (iii) individual job losses (from the start of the pandemic), and two measures of personal COVID-19 exposure: (iv) whether a given individual experienced a severe case of COVID-19 illness, and (v) whether someone close to a given individual (a friend or family member) died of COVID-19. Measures (iv) and (v) are novel in the context of the literature on COVID-19 effects on political preferences. Given the close link between age and the health risks of COVID-19, our analysis conditions on local-area (municipality) pre-pandemic age structure.
We find that the political consequences of the pandemic operate similarly at the individual and group (municipality) levels, but that they vary through phases of the pandemic. Much of the literature focuses on local-area exposure to the pandemic. We find that, during the “high” phases of the pandemic (with elevated death rates), higher municipality-level COVID-19 fatalities lead to lower support for the populist government (in line with the literature), but that this effect gradually dissipates after death rates decline, such that there is no “memory” of local-area COVID-19 deaths in the post-pandemic parliamentary elections. We uncover a rich set of findings at the personal-experience level: In the “high” phase of the pandemic, individuals who experienced severe COVID-19 symptoms support the government more, and those who experienced COVID-19 deaths among their friends and family support the government less (and extremist parties more), in line with keeping the government politically accountable for its handling the pandemic. 5 The “memory” of COVID-19 deaths among friends and family fades quickly, as we detect no effects by the end of the last pandemic wave. Having recovered from a serious case of COVID-19 leads to more votes for the government in Oct 2021 elections, as the only remaining “memory” of COVID-19. Finally, we find limited evidence that higher municipality unemployment during the pandemic increases support for extremist parties.
We conclude that even the extreme COVID-19 exposure experienced by some Czech locations and by many Czech citizens had few long-lasting consequences for political preferences and election outcomes. While the electorate held its political leaders accountable for handling the pandemic during its acute stages, the electorate’s memory is short-lived. Perhaps political accountability is stronger for economic trends or long-term epidemics that are consistently mishandled, and thus more directly attributable to policy than a temporary “natural” disaster or pandemic. 6 It is also possible that the post-pandemic accountability effect operates at the national level, and is not driven by variation in local exposure and personal experiences.
Parliamentary Elections of 2017 and 2021
Our empirical analysis uses pre-pandemic 2017 parliamentary elections as a point of departure; we define our categories of political parties with reference to these elections. The 2017 elections were won by the political movement ANO (YES in English) with almost 30 percent of the vote, followed by ODS (Civic Democratic Party, 11 percent), Piráti (Czech Pirate Party, 11 percent), SPD (Freedom and Direct Democracy, 11 percent), KSČM (Communist Party of Bohemia and Moravia, 8 percent), ČSSD (Czech Social Democratic Party, 7 percent), KDU - ČSL (Christian and Democratic Union - Czech People’s Party, 6 percent), TOP 09 (Tradition, Responsibility, Prosperity 09, 5 percent), and STAN (Mayors and Independents, 5 percent). Andrej Babiš, Czech billionaire and media owner, founder and leader of ANO, formed a government coalition with Social Democrats that held power between Jun 2018 and Dec 2021, that is, during our entire analysis period.
We classify these parties based on whether they display populist or extremist features (e.g., Laver 2014); specifically, we adopt a classification based on the PopuList project (https://www.popu-list.org/). According to PopuList (Rooduijn et al. 2019), ANO is a centrist populist political movement, SPD is a far-right party, 7 and KSČM is a far-left party. 8 We thus classify the government coalition as “populist government,” and the two extremistm parties as “extremist opposition”; the remaining opposition parties in the 2017 Parliament are all mainstream parties, which we denote as “democratic opposition.”
It is also important to understand how parties approached the pandemic, not only where they stand on the left-right/populist spectrum. The government was in charge of the pandemic policies; it introduced early lock-downs and focused on the availability of healthcare facilities (intensive-care in particular). 9 The democratic mainstream opposition also supported pandemic policies, as did (at least tacitly) the far-left Communists. The far-right SPD party was the only party actively involved in pandemic hoax theories. 10
Mandate Shares and Turnout in Parliamentary Elections in 2017 and 2021.
Note: Share of mandates obtained and voter turnout. The 2017 government coalition consisted of ANO (a populist party) and Social Democrats. Extremist opposition included the far-right SPD and the far-left Communists. Democratic opposition as of 2017 included ODS, TOP 09, KDU, Pirates, and STAN. Source: https://www.volby.cz/, own calculations.
Data
Our analysis is based on both individual- and municipality-level data. The individual data come from a unique longitudinal household survey that tracks the evolution of the pandemic in the Czech Republic. Respondents to the “Life in the Pandemic” survey were asked about their current political preferences at multiple survey waves, and (retrospectively) about their 2017 voting behavior.
Depending on the wave, the sample consists of about 2,000 interviews, and it replicates the demographic composition of the Czech population aged 18+ (see Bartoš et al. 2022; Prokop et al. 2021). 12 We rely on multiple data sources at the municipality level: We use precise measures of daily COVID-19 fatalities for the 205 higher-level Czech municipalities 13 obtained from the Institute of Health Information and Statistics of the Czech Republic, 14 and normalized using 2019 municipality population obtained from the Czech Statistical Office (CSO). 15 Finally, we use official municipality data on the share of unemployed 16 and on parliamentary election outcomes. 17
Variable Definition: “Life in the Pandemic” Survey and Municipal Data.
Summary Statistics - Survey Data Used in the Main Regressions.
Note: Based only on individuals who reported their voting choices both in 2017 and the respective survey wave. Voting in 2017 parliamentary elections is based on respondents’ recollection. Political preferences in all other columns except the last one are based on a hypothetical question about who the respondent would vote for if elections were held today (on the day of the survey). The last column is based a question on who the respondent voted for in the 2021 parliamentary elections (asked about a week after the elections were held.) The share of COVID-19 fatalities in the population is standardized at a given point in time at the municipality level (Std Cumu COVID), which is why the individual-weighted mean is not equal to zero.
Methodology
We apply a series of fixed-effects regressions, each based on comparing two periods: a pre-pandemic benchmark versus one of the four pandemic points described in Figure 1 (1st Wave, All Waves, Post Covid, Elections). The pre-pandemic benchmark consists of the votes in the Oct 2017 parliamentary elections coupled with individual March 2020 data on current unemployment status, 2017 municipality data on the share of unemployed, and 2019 municipality data on pre-pandemic age structure.
20
In all of our analyses, we cluster standard errors at the municipality level, and control for pre-pandemic municipality age structure (to reflect the close relationship of COVID-19 fatalities with age). We thus estimate the following models:
Results
We first study the effect of the pandemic on voter turnout at various stages of the pandemic. Next, we focus on the effects on preferences and/or votes for one of the three party types defined in Section 2. Finally, we check whether our results are affected by survival bias.
Pandemic Impact on Voter Turnout
The COVID-19 pandemic has been shown to lower voter turnout during the early stages of the pandemic (e.g., Fernandez-Navia, Polo-Muro, and Tercero-Lucas 2021; Picchio and Santolini 2022). 22 The decision not to vote (in person) may reflect fear of COVID-19 infection; it may also reflect disappointment with governmental pandemic policies or diminishing trust in democracy. Our focus on “high” versus “low” phases of the pandemic can help to shed light on these underlying mechanisms, since the health fear factor is less important in the “low” phases. Moreover, during the pandemic, respondents to the Life in the Pandemic survey answer a hypothetical question whether they “would participate in elections if they were held now” in the four stages of the pandemic denoted in Figure 1—they are thus at no health risk when answering yes. Finally, we study actual turnout in the first national elections that took place after the pandemic, in Oct 2021, when all major COVID-19 waves were over.
COVID-19 Impact on Voter Turnout.
Standard errors in parentheses.
*p < 0.05, **p < 0.01.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level.
We obtain qualitatively and quantitatively similar estimates in the final two columns of Table 4, where we study the actual (non-hypothetical) voting participation change between the Oct 2017 and the Oct 2021 parliamentary elections using individual-level election participation self-reported by respondents to the Life in the Pandemic survey.
The estimated coefficients are consistent with pandemic experiences having no impact on actual post-pandemic election turnout, in line with zero effects of the pandemic on hypothetical election participation question during the pandemic, since both answers carry no concerns regarding health impacts. Similarly, in none of our regressions does municipality unemployment or individual joblessness have any effect on election participation.
In the Appendix Table A.2, we confirm the municipality-level findings presented in Table 4 in alternative (robustness) specifications based on complete administrative data on voter turnout across all Czech municipalities (except the capital of Prague). 23
COVID-19 Phases and Political Preferences
Political Preferences - 1st Wave - November 2020.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. The sample consists of those respondents who voted in 2017 and stated that they would vote in November 2020 if elections were held then.
Political Preferences - All Waves - April 2021.
Standard errors in parentheses.
*p < 0.05, **p < 0.01.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. The sample consists of those respondents who voted in 2017 and stated that they would vote in April 2021 if elections were held then.
By the end of a six-month period of high fatality levels, in April 2021, this picture changes substantially. In Table 6, relatively high-COVID-19 fatalities at the municipality level lower support for the government that was handling the pandemic, consistent with the literature (e.g., Baccini, Abel, and Weymouth 2021). A one standard deviation increase in the municipality level of COVID-19 fatalities lowers support for the government coalition by over 4% points, which is more than 10 percent of its base support level. Further, the personal experience of (recovering from) a serious COVID-19 case raises support for the government, 25 while losing a friend or family member to COVID-19 leads to dramatically higher support for extremist opposition parties (at the expense of the government), consistent with the political accountability literature. 26 We find little evidence that economic hardship (at the municipality or individual level) matters for voting intentions.
Political Preferences - Post-COVID-19 - June 2021.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. The individual-level sample consists of those respondents who reported having voted in both the 2017 and the 2021 elections.
Post-COVID-19 Elections - October 2021.
Standard errors in parentheses.
*p < 0.1, **p < 0.05, ***p < 0.01.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. The individual-level sample consists of those respondents who report having voted in both the 2017 and the 2021 elections.
Finally, in Appendix Table A.3, Section A.2, we provide a robustness check for the municipality-level coefficients based on official voting data from Oct 2017 and Oct 2021 covering all municipalities. We also estimate the municipality-level regressions on the subset of municipalities covered in the survey. All of these estimates confirm the lack of COVID-19 fatality effects on voting behavior. Looking across municipalities in which, at the maximum (minimum) of the municipality distribution 0.6 (0.1) of a percentage point of the population died of COVID-19 during the pandemic, voters do not hold the government accountable 3 months after the end of the pandemic. However, in line with, for example, Wu and Huber (2021), using the precise full-coverage administrative municipality data, we now find that higher unemployment (relative to the 2017 benchmark) leads to stronger support for the extremist opposition at the expense of the vote share of the government coalition. Increasing the share of unemployed in a municipality by 1% point leads to a 0.6 p.p. increase in the support for extremist parties.
In sum, we find evidence consistent with the political accountability literature: During the acute phases of the pandemic, voters respond to their COVID-19 exposure at both the personal and community level in line with punishing less competent handling of the pandemic. Shortly after the pandemic, however, only variation in unemployment affects voter behavior in Parliamentary elections (again, consistent with the literature), while there appears to be almost no electoral “memory” of extreme COVID-19 experiences.
Extensions and Robustness Checks
Long-Term vs. Recent Local COVID-19 Exposure
Cumulative and Recent (2W) COVID-19 - All Waves - April 2021.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. We control for the share of COVID-19 fatalities in the municipality population from the start of pandemic (cumulative, without the prior 2 weeks) and in the final 2 weeks prior to April 2021. Recent fatalities are subtracted from the cumulative COVID-19 measure to separate the effect of the two different measures and avoid collinearity.
The estimates in Table 9 show that, in their survey-reported voting intentions, voters react to the longer-term accumulated municipality COVID-19 exposure, while they do not react to the municipality pandemic experience over the prior 2 weeks. This suggests that voters do keep an account of the longer-term health consequences of the pandemic, while the pandemic was in its acute “high” phase. Alternatively, it could be that voters do not have data on recent local COVID-19 fatalities. 27
Extreme Left versus Extreme Right
Extreme Right Versus Extreme Left - All Waves - April 2021.
Note: Regressions specifications correspond to equation (1) estimated at the individual level (survey data). Standard errors are clustered at the municipality level. The preference for extremist parties (EXT) in the first column is separated into the preference for the far-right party (SPD) and the far-left party (KSCM). The sample consists of those respondents who voted in 2017 and stated that they would vote in April 2021 if elections were held then.
There is no difference in the (small and statistically insignificant) effects of municipality-level COVID-19 fatalities or unemployment on voting intentions across the two parties. However, there is a distinct pattern of COVID-19 effects at the personal-experience level. The increase in the probability of voting for an extremist party after losing a friend or relative to COVID-19 is mostly driven by a rise in the preferences for the far-left party (KSCM). Further, the coefficients corresponding to recovering from a severe COVID-19 case are qualitatively different, even if they are both statistically indistinguishable from zero. The size of the positive effect of having recovered from a severe case of COVID-19 on the probability of voting for the Communist party (a 5 p.p. increase) is comparable in magnitude to the positive impact on support for the Communist party of the loss of a relative or friend to COVID-19. Perhaps these positive effects for the Communist party are in line with strong support of the party for public healthcare system, that is, affordable healthcare provision. 29 On the other hand, having a personal experience with a severe case of COVID-19 lowers support for the far-right SPD—the only Czech party associated with hoax pandemic theories—albeit without reaching statistical significance.
Survival Bias
Politicians can affect voters’ risky behavior in a pandemic (Ajzenman, Cavalcanti, and Mata 2023; Bursztyn et al. 2023), and a conspiracy mentality has been shown to be greater among those with extreme left and, especially, extreme right political preferences (Imhoff et al. 2022). Our main analysis explores the impact of local and individual COVID-19 exposure on political preferences and voting behavior. However, to the extent that some (particularly extremist) parties or political leaders encouraged risky behavior during the pandemic, they risked losing part of their electorate to COVID-19 fatalities. This could lead to survival bias in the samples we study in our baseline analysis. Survival biases due to differences in risky behavior could also arise solely in relation to pre-pandemic political preferences, that is, without additional encouragement of risky behavior during the pandemic.
Imhoff and Lamberty (2020) show that conspiracy beliefs describing the pandemic as a hoax are linked to more risky behavior during the pandemic, while conspiracies about a purposeful creation of the virus are associated with less risky behavior. As we document in Appendix Section A.1, only the extreme-right SPD party supported hoax theories, while the populist government imposed strong lock-downs and encouraged preventative behavior. Could this lead to survival bias among SPD voters? We provide two checks on the presence of survival bias: one based on municipality data, the other based on survey data.
First, we find no relationship between the municipality share of votes cast for extremist parties in the pre-pandemic 2017 parliamentary elections and our cumulative COVID-19 municipality fatality rate as of Oct 2021 (see Table A.4 in the Appendix Section A.2). 30 As for our survey data, in Appendix Section A.2, Figures A.1, A.2, and A.3, we relate the share of survey respondents who indicate that they voted for a particular party in the 2017 Parliamentary elections in the first wave of the survey (before any COVID-19 deaths, weighted using the sampling weights) to the subsequent municipality cumulative COVID-19 death rate up to the October 2021 wave. We again find no relationship, which is reassuring in terms of the potential presence of survival bias. There is a positive but very small and statistically insignificant coefficient of the vote share for the Communists (KSCM) and the populist government on the subsequent municipality cumulative COVID-19 death rate. The coefficient for the far-right SPD, the only party whose pandemic views could have increased risky behavior, is actually negative (and also extremely small and statistically insignificant). Note that a difference of 10 p.p. in the vote share for KSCM (populist government) across municipalities in the 2017 elections would result in only 0.002 (0.001) p.p. difference in the size of the municipality populations during the 2021 elections.
Conclusion
The dramatic health and economic consequences of the worst pandemic in a century have presented a major test for governments’ capacity to deliver in difficult times. Has the pandemic performance of governments led to significant changes in voters’ preferences? We make two contributions to the literature on the effects of the COVID-19 pandemic on political preferences: We track the effect of the pandemic through its qualitatively different stages, and we control for economic and health costs of the pandemic at both the individual and the local-area level. This allows us to paint a comprehensive picture of the effects of the pandemic on political preferences and election outcomes in a country that experienced long pandemic lock-downs and high rates of COVID-19 fatalities.
We find that the political consequences of the pandemic operate similarly at the individual and group (municipality) levels, which is reassuring for research relying solely on group- level variation. Our findings on voter turnout imply that one’s exposure to the pandemic has no effect on the willingness to vote in post-pandemic elections, and it does not affect hypothetical voting (with no health exposure) during the pandemic. These findings are thus consistent with the literature, which suggests that direct health risk exposure of voting during acute stages of the pandemic depresses turnout.
Turning to political preferences, we find that extremist voters who themselves experienced severe cases of COVID-19 tend to switch from the extreme-right to the extreme-left, consistent with extreme right being more strongly associated with pandemic hoax theories, which lose credibility through personal experiences. Outside of extreme-party voters, less able handling of the pandemic is associated with voters moving away from the government, which was in charge of anti-pandemic measures. These findings are broadly consistent with the existing literature, which uncovers political accountability during the early “high” stages of the pandemic (Baccini, Abel, and Weymouth 2021; Neundorf and Pardos-Prado 2022). However, we also find that this adjustment of political preferences occurs only in the “high” COVID-19 phase, and by the time of the first post-pandemic elections, the pandemic appears to have mostly been forgotten, despite the fact that in several Czech municipalities, more than 0.6 percent of the population died of COVID-19. This is a novel finding in the literature on the political consequences of the COVID-19 pandemic. Our evidence also contributes a new dimension to the literature on voters’ short-term memory, which has focused on whether voters respond more to outcomes that arise in the election year as opposed to longer-term outcomes (Bechtel and Hainmueller 2011; Healy and Lenz 2014).
In sum, our analysis extends evidence available from post-soviet countries (Becher et al. 2024, cover only Poland), and is consistent with the COVID-19 literature, in that poor handling of the pandemic does not lead to stronger support for non-democratic alternatives (Becher et al. 2024), and political accountability applies to acute stages of the pandemic similarly as to other political contests (Lewis-Beck and Stegmaier 2000; Tilley, Neundorf, and Hobolt 2018). Our novel findings suggest that the political accountability of the pandemic is short-lived, that is, that voters have a short memory of the attribution of COVID-19 experiences to political leaders. If confirmed in other setting (e.g., Achen and Bartels 2017), this short memory could be an important driver of party polarization, as suggested by models in which voters collectively learn about parties and policies (Razin and Levy 2025).
Supplemental Material
Supplemental Material - Political Preferences Through Stages of the COVID-19 Pandemic
Supplemental Material for Political Preferences Through Stages of the COVID-19 Pandemic by Alena Bičáková and Štěpán Jurajda in Political Research Quarterly.
Footnotes
Acknowledgments
We gratefully acknowledge support by the Volkswagen Foundation (under grant “The Rise of Populist Parties in Europe”) and thank the project participants, especially Sergi Pardos-Prado and Steffen Mueller, for their helpful comments.
Declaration of Conflicting Interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: We gratefully acknowledge support by the Volkswagen Foundation (under grant “The Rise of Populist Parties in Europe”).
Supplemental Material
Supplemental material for this article is available online.
Notes
References
Supplementary Material
Please find the following supplemental material available below.
For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.
For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.
