1. Joshua D. Clinton is the Abby and Jon Winkelried Professor of Political Science at Vanderbilt University in Nashville, Tennessee, USA.
2. John Lapinski is the Robert A. Fox Professor of Political Science at University of Pennsylvania in Philadelphia, Pennsylvania, USA.
3. Sarah Lentz is a Research Associate at the Penn Program on Opinion Research and Election Studies at the University of Pennsylvania in Philadelphia, Pennsylvania, USA.
4. Stephen Pettigrew is the Director of Data Sciences at the Penn Program on Opinion Research and Election Studies at the University of Pennsylvania in Philadelphia, Pennsylvania, USA.