Using multi-country data from 62 elections since 1952, we show that 17% to 29% of voters make up their mind during the final two months of campaigns, generating sizeable swings in candidates' vote shares. We obtain these results by measuring the consistency between vote intention and vote choice...

We study the characteristics and behavior of small campaign donors and compare them to large donors by building a dataset including all the 340 million individual contributions reported to the U.S. Federal Election Commission between 2005 and 2020. Thanks to the reporting requirements of online...

We evaluate the impact of an online platform giving job seekers tips to improve their search and recommendations of new occupations and locations to target, based on their personal data and labor market data. Our experiment used an encouragement design and was conducted in collaboration with the...

Using original data from two waves of a survey conducted in March and April 2020 in eight OECD countries (N = 21,649), we show that women are more likely to see COVID-19 as a very serious health problem, to agree with restraining public policy measures adopted in response to it, and to comply...

Beyond its immediate impact on public health and the economy, the COVID-19 pandemic has put democracy under stress. While a common view is that people should blame the government rather than the political system for bad crisis management, an opposing view is that dissatisfaction with government...

Millions of people refuse COVID-19 vaccination. Using original data from two surveys in nine OECD countries, we analyze the determinants of anti-vax intentions in December 2020 and show that half of the anti-vax individuals were vaccinated by summer 2021. Vaccinations were more likely among...

We study the characteristics and behavior of small campaign donors and compare them to large donors by building a dataset including all the 340 million individual contributions reported to the U.S. Federal Election Commission between 2005 and 2020. Thanks to the reporting requirements of online...