This paper investigates whether the COVID-19 crisis has affected the way we think about (political) institutions, as well as our broader (policy) attitudes and values. We fielded large online survey experiments in Italy, Spain, Germany and the Netherlands, well into the first wave of the epidemic (May-June), and included outcome questions on trust, voting intentions, policies & taxation, and identity & values. With a randomised survey ow we vary whether respondents are given COVID-19 priming questions first, before answering the outcome questions. With this treatment design we can also disentangle the health and economic effects of the crisis, as well as a potential "rally around the ag" component. We find that the crisis has brought about severe drops in interpersonal and institutional trust, as well as lower support for the EU and social welfare spending financed by taxes. This is largely due to economic insecurity, but also because of health concerns. A rallying effect around (scientific) expertise combined with populist policies losing ground forms the other side of this coin, and suggests a rising demand for competent leadership.

In this paper, we revisit the combined effect of horizontal and vertical tax externalities in a federal context, extending the theoretical framework of Keen and Kotsogiannis (Am Econ Rev 92(1):363–370, 2002) by allowing for ad valorem and residence-based taxation. When taxes are levied ad valorem rather than per-unit firstly, we find the interaction between both types of externalities is more ambiguous than commonly understood. As a result, and contrary to earlier findings, fiscal equalisation mechanisms such as the representative transfer system (RTS) fail to fully internalise the tax externalities. Given these limitations, we derive the conditions under which a standard RTS will either: (1) at least nudge politicians in the right direction; (2) realise no welfare gains at all; (3) considerably overshoot the second-best efficiency mark causing welfare loss. Lastly, we find that when taxation is residence-based rather than source-based, a different kind of competition emerges where tax cuts are aimed at stimulating outward factor flows, rather than attracting inward flows

The causal nexus between socio-economic stressors and anti-immigration sentiments remains unclear despite increasing evidence over their correlation. We exploit the social and economic disruptions brought about by the epidemic outbreak in March 2020 to randomly provide survey respondents with, at the time of the survey, pessimistic information about the economic and health consequences of the epidemic. Both economic and social stressors causally induce upsurges in anti-immigration sentiment and demand for fiscal pressure retrenchment. However, radicalised attitudes are accompanied by political radicalisation only when the negative economic consequences of the epidemic are highlighted.

To investigate how Covid-19 is shaping the way Europeans think about institutions, we conducted a large online survey experiment during the first wave of the epidemic (June). With a randomised survey ow we varied whether respondents are given Covid-related treatment questions first, before answering the outcome questions. We find that the crisis has severely undermined trust in politicians, the media, the EU and social welfare spending financed by taxes. This is mainly due to economic insecurity, but also because of health concerns. We also uncover a rallying effect around (scientific) expertise combined with populist policies losing ground.