Source: Alfred T. DeMaria, Management Report for Nonunion Organizations, Volume 41 Issue 10, October 2018
From the abstract:
While unions use digital communications, including email, social media, websites, and apps, the humble printed‐paper flyer remains a staple of many organizing campaigns. There are several reasons. Organizers typically do not have the email addresses of all employees they need to reach digitally. Even when the union can send email, it may be read quickly or not read at all and deleted. In contrast, a flyer can be read several times over, passed along to others, and referred to during the course of the campaign.