Over the past couple of decades, the response rates to surveys administered in the United States have plummeted. The American Association for Public Opinion Research has released "Current Knowledge and Considerations Regarding Survey Refusals," which is a pretty comprehensive report on what is currently known about refusals and the impact that they have on the validity of research. You can download the report here.
David J. Mangen
I'll use this space to make some occasional comments about statistics, numbers and research issues as seen in the world today.