One of the most important things leaders do is communicate. Though research on leaders'
communication has been active for half a century, to date there has been little effort to review …

Leaders are part of virtually all organized political life. There have been important recent
advances in modeling “leaders” as well as clever and innovative empirical studies. We …

Background COVID-19 spread rapidly in Brazil despite the country's well established health
and social protection systems. Understanding the relationships between health-system …

This paper investigates whether the anti-scientific rhetoric of modern populists can induce
followers to engage in risky behavior. We gather electoral information, credit card expenses …

Democracy has many attractive features. Among them is its tendency to track the truth, at
least under certain idealized assumptions. That basic result has been known since 1785 …

Parliamentary debate is a fundamental aspect of democratic law-making. While law makers
everywhere seek to express their views in parliament, there are large discrepancies in who …

Campaign organizers and the media appear to agree that voters' perceptions of party
leaders have an important impact in elections: considerable effort is made to ensure that …

Participation in legislative debates is among the most visible activities of members of
parliament (MPs), yet debates remain an understudied form of legislative behavior. This …

Is electoral competition good for political selection? To address this issue, we introduce a
theoretical model where ideological parties select and allocate high-valence (experts) and …

Recent antiregime protests throughout the world have been publicized, and arguably
facilitated, by social media and other communication technologies. I develop formal models …