September 23, 2015


  • Properly conducted web-based surveys aren’t necessarily that bad (from Pew Research) “Of 406 separate estimates taken from nine waves of the American Trends Panel, just nine of them differed by 5 percentage points or more. Perhaps not surprisingly, all nine are related to internet or digital technology use. A Web-only survey estimated that 82% of the public uses the internet on a daily basis, while the full sample (including non-internet users) finds 69% go online daily.”
  • Aardwolf Research is doing a flag-preference poll (mentioned in Stuff).  On the good side, they have sensible ways of looking at lots of possible flags. On the bad side, we don’t have lots of possible flags any more. On the good side they collect demographic data that could be used to get fairly representative weighted results from their self-selected internet sample. On the bad side, their results from the first wave don’t seem to use the demographic data at all.

Thomas Lumley (@tslumley) is Professor of Biostatistics at the University of Auckland. His research interests include semiparametric models, survey sampling, statistical computing, foundations of statistics, and whatever methodological problems his medical collaborators come up with. He also blogs at Biased and Inefficient See all posts by Thomas Lumley »