The interview will be conducted face-to face and will average 90 minutes in length but will vary considerably from respondent to respondent. The length can range from 60 minutes to a couple of hours to administer. Given the varying length of the survey administration as well as acknowledging that travel time to visit households will vary and that some assignments will be more difficult to work, we require that interviewers be paid by the hour rather than by the competed interview. We have found repeatedly that interviewers will take short cuts to make the interview shorter or only interview easy cases if they are paid by the completed interview.