As an example, in 2014 Pew Research Center switched from exclusively using live phone with random-digit-dial sample to also using a probability-based panel. In 2020 the Center added an additional ...

With headquarters in Dublin, Ireland, ICON employed approximately 41,100 employees in 97 locations in 55 countries as at June 30, 2024. For further information about ICON, visit: www.iconplc.com.