Hi David,
Very good questions. The poll was conducted on Tuesday and Wednesday of last week (23 & 24 August, 2016). There were 815 respondents and they are simply NewBrief readers. Unfortunately, we do not have detailed breakdowns of their characteristics, nor summary statistics for the cohort to confirm whether or not they represent the markets as a whole. Lastly, we do not have other surveys to compare with ours. Hope this helps. Thank you.