John G. Geer
In Defense of Negativity
Attack Ads in Presidential Campaigns
Florike Egmond is a postdoctoral fellow at the Leiden Scaliger Institute.
Paul G. Hoftijzer is professor in the history of the book in the early modern period and senior lecture in the Department of Book and Digital Media Studies, Leiden University, the Netherlands.
Robert P. W. Visser is the Teylers Professor of the History of the Natural Sciences at Leiden University and senior lecturer in the Institute for the History of Natural Science at Utrecht University.