There will be an initial mailing. We will be doing follow-ups as well. Ultimately, if don't get a response from the household, we will be taking a sample of non-respondents and going to the door hoping to speak to the respondent. If possible, we might interview them at the door. We will return multiple times until we actually succeed in speaking to the respondent. If the respondent is there and initially refuses to complete the NHS, we will go back one more time in an effort to persuade them. If at that point they refuse again, we will stop any follow-up efforts.
We're hoping through this technique that we will be able, if you will, for what I might describe as a core sample, to push the response rates to a very high level, which will help us deal with some of the issues of response bias.