Can a non-probabilistic online panel achieve question quality similar to that of the European Social Survey?
Melanie Revilla and Willem Saris
RECSM, Universitat Pompeu Fabra
Germán Loewe and Carlos Ochoa
Netquest
Introduction
Online surveys are becoming more and more common. They are present in many different forms: different lengths, different topics, different ways of proposing the survey to the respondents (e.g. banner, emails, opt-in surveys versus by invitation only surveys), different objectives (e.g. improving products, selling more, knowing behaviours, opinions or attitudes), different incentives systems (e.g. money, presents, points), different ways of getting...