We evaluate how traditional parties may respond to populist parties on issues that are particularly fitting for populist messages. The testing ground is the 2020 Italian referendum on the reduction of members of Parliament. We implement a large-scale field experiment, with almost one million...

We evaluate how traditional parties may respond to populist parties on issues aligning with populist messages. During the 2020 Italian referendum on the reduction of members of Parliament, we conducted a large-scale field experiment, exposing 200 municipalities to nearly a million impressions of...